Wiktor Wise
Sticking piano keys can be caused by a variety of factors, including changes in humidity, foreign objects lodged between keys, and the buildup of dirt or dust. To fix sticky electric piano keys, it is important to first identify the cause of the issue. If the keys are sticky due to humidity, regulating the humidity of the room with a humidifier or a piano heater-bar can help. If the issue is caused by foreign objects or dirt, carefully disassembling the piano and removing the objects or cleaning the keys may solve the problem. In some cases, sticking keys may be due to more complex mechanical issues, such as problems with the jack flange or hammer flange, which may require the assistance of a technician for repair. Proper maintenance and cleaning of electric piano keys are crucial to ensure optimal playability and sound quality.
Characteristics and Values Table for Fixing Sticky Electric Piano Keys
| Characteristics | Values |
|---|---|
| Cause | Build-up of moisture, foreign objects lodged in between keys, key slip being too close to the front of the white keys, change in climatic conditions, high humidity |
| Solution | Depress the key slowly and move it gently from side to side, use a hygrometer to monitor humidity, regulate humidity with a humidifier, loosen the key slip and remove foreign objects, clean the keys, perform "key easing" by removing each key, compressing the key bushing felts, and replacing the key |
| Additional Tips | Ensure proper maintenance and cleaning, monitor the temperature and humidity levels, be cautious when removing and reassembling piano parts |
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What You'll Learn
Remove any foreign objects between the keys
Sticking piano keys are usually easily fixed and are nothing to worry about. One common cause of sticky keys is foreign objects becoming lodged between them. Food, coins, paper clips, pencils, sheet music, and dirty rail pins are some examples of items that can get stuck under the keys. To remove any foreign objects between the keys, follow these steps:
First, try to identify if there is an object stuck between the keys by carefully examining the keyboard. If you spot an object, try to remove it with a tool such as an opened-up paper clip or a knife. Alternatively, you can blow canned air between the keys to dislodge the object. Be careful not to damage the keys or the instrument during this process.
If the object is stuck underneath a key, you may need to examine the piano's interior. Start by removing the lid, the music shelf, the fallboard, and the fallstrip with a screwdriver. Label the screws as you remove them to ensure they go back in the correct places. Once you have accessed the interior, hold the back of the key firmly and lift the front end about 1/2 inch or 12mm. Gently shake the key to dislodge the object and then return it to its original position.
If you are unable to remove the object or are concerned about causing damage, it is best to contact a piano technician for assistance. They will have the experience and tools necessary to safely remove any foreign objects and ensure your piano is in proper working order. Regular servicing and maintenance of your piano can also help prevent sticky keys and identify potential issues before they become more serious.
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Loosen key slip screws and adjust the key slip
If your electric piano keys are sticky, it could be due to the key slip being too close to the front of the white keys. The key slip is the piece of wood that sits in front of the keys and houses their front part. To loosen the key slip screws and adjust the key slip, follow these steps:
First, locate the screws that hold the key slip to the piano. These are typically found underneath the piano keyboard, and there can be between two and four screws. Once located, identify the type of screws you are dealing with—they could be flathead, Phillips, or a different variety.
Next, using the appropriate screwdriver, loosen the screws. Be careful not to completely remove the screws, as you will need to re-screw them later. After loosening the screws, gently remove the key slip by hand. Check for any debris, dust, or objects that may have fallen behind the key slip or become lodged underneath the keys. Common objects found in this area include coins, paper clips, pencils, and sheet music.
If necessary, use a vacuum to remove any dust or debris. You can also wipe down the area with a soft cloth to ensure that the keys are free to move up and down without obstruction. Once the area is clean and clear of any obstructions, carefully replace the key slip, ensuring that it sits evenly between the two ends of the piano.
Finally, re-screw the key slip onto the piano. When reinstalling, do not tighten the screws too much, as this can squeeze the wood and affect the key action. Instead, screw each one in a little at a time to ensure that the key slip remains even. Test the keys to make sure they are functioning properly, and adjust the position of the key slip as needed.
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Control the room's temperature and humidity
Sticking piano keys are often caused by changes in temperature and humidity. Pianos are mostly made of natural materials like wood, felt, glue, and cast iron, so fluctuations in temperature and humidity can cause the wood to swell or contract, leading to sticky keys. Therefore, controlling the temperature and humidity of the room where the piano is kept is crucial for preventing and fixing sticky keys.
To maintain optimal conditions for your piano, it is recommended to keep the humidity levels between 35% and 60%. You can use a hygrometer to monitor the humidity levels in your room. A hygrometer is an inexpensive tool that will help you keep track of the climatic conditions affecting your piano. If the humidity levels are too high or too low, you can adjust them by using a humidifier or a dehumidifier, respectively. Additionally, consider investing in a slow-release specialist "piano heater-bar" to ensure consistent temperatures.
Temperature control is also essential. The ideal temperature range for pianos is between 17°C and 21°C (70°F). Significant deviations from this range can cause the piano's components to expand or contract, leading to sticky keys. Maintaining a stable temperature within this range will help prevent this issue.
Regular cleaning and maintenance of your piano are also important. Dust, debris, and foreign objects can get stuck inside the piano and affect the keys' movement. Additionally, yearly tuning and preventative maintenance by piano technicians, such as liquid lubrication, can help resolve and prevent sticky key issues.
By controlling the temperature and humidity of the room, regularly cleaning and maintaining your piano, and seeking professional maintenance when needed, you can effectively prevent and fix sticky electric piano keys.
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Change the centre pins
Changing the centre pins is a more advanced solution to fixing sticky electric piano keys. It is a good idea to consult a certified piano technician for guidance or to carry out the procedure for you.
Each key of your piano is connected to a jack flange, which is in turn connected to a hammer flange. Both the jack flange and the hammer flange have a centre pin. The centre pins help to hold the keys in place as they go through their vertical motion. Sometimes, the pins become too tight, resulting in heavy actions and slow mechanical response. This can be caused by the swelling and contraction of the wood due to changes in humidity.
If you notice that the pins have become tarnished, you may need to polish them to smoothen them. However, if the pins are too tight, you might have to change them. To do this, you will need to remove the key and the cabinet parts of the piano. This will expose the centre pins, which can then be replaced. It is important to be very careful when performing this procedure, as the keys and other components of the piano are fragile.
Once the new centre pins have been installed, gently work the keys to ensure they are moving smoothly. If you notice any sticking or resistance, you may need to adjust the pins or the surrounding components. It is important to ensure that the pins are secure and functioning properly before playing the piano again.
By following these steps and consulting a professional when needed, you can successfully change the centre pins and resolve the issue of sticky electric piano keys.
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Clean the keys
If your electric piano keys are sticky, cleaning them is an important first step. Proper maintenance and cleaning of digital piano keys will ensure perfect playability and sound experience.
First, determine the material of your keys. If you have ebony black and ivory white keys, you will need to clean them with extensive care. Many digital pianos nowadays have plastic keys. If you see yellowing in your white keys, or if you can see a grain or a join between the bottom and top layers of the keys, then you have plastic keys.
For plastic keys, use a damp cloth for cleaning. Add a small amount of liquid soap to the cloth. Your grip should be firm but the rubbing should be light. Gently rub the keys until they are completely clean.
For ivory keys, you will need to use an ivory scraper. If the keys are still stuck after cleaning, check the cleaning instructions specific to your piano brand. You can find these instructions in the user manual or by searching online.
If your piano keys are sticky, it could be due to a variety of factors. A common cause is a build-up of moisture affecting the movement of the keys. Levels of moisture in the air can affect how your piano plays. Pianos perform best at a controlled temperature of 70 degrees Fahrenheit and 42% humidity. If not kept temperate, your piano's components may swell or contract when exposed to extremes. This expansion and contraction are the primary cause of piano keys sticking.
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Frequently asked questions
There could be a variety of reasons for sticky electric piano keys. Some common causes are changes in humidity, foreign objects lodged between the keys, or the key slip being too close to the front of the white keys.
Pianos perform best at a controlled temperature of 70 degrees Fahrenheit and 42% humidity. If the humidity is too high, it can cause the keys to swell and stick. You can invest in a hygrometer to monitor the humidity levels and consider a humidifier or a "piano heater-bar" to regulate the humidity.
You can try to remove the object with an open paper clip, a knife, or blow it out with canned air. If that doesn't work, you may need to remove the lid, music shelf, fallboard, and fallstrip to access the interior and examine the keys more closely.
The key slip is the long piece of wood located right below the keys. If it is too close to the white keys, it can cause them to stick. To fix this, simply grip the key slip and pull it forward. You may also need to loosen the screws under the keybed and place cardboard shims between the key slip and the end blocks.
