I bought my piano 3 months ago and since it's arrived 8 keys…

I will do my best to assist you with your problem. As you have not replied, I will give you the best answer possible, with the information you have provided.

1. Stuck or Sticky Keys

One of the most obvious problems to identify is sticky or stuck keys — it doesn’t take an expert to realize when the keys aren’t returning to form. However, just because it’s easy to identify doesn’t mean it’s easy to fix.

Sometimes, the key could require only a slight wiggle to make everything slide back to its original state. Even so, it’s imperative that you consult a professional to examine the root of the problem. Even if it returns to form, a stuck key could be a symptom of a more significant problem.

Some possible culprits of sticky keys are:

• Physical Blockages: One of the reasons to keep food other crumbly substances away from your keyboard is that it only takes a small obstruction for the keys to become jammed.

• Humidity Issues: Unsurprisingly for an instrument made of wood, moisture can wreak havoc on a piano. It’s important not only to ensure you keep beverages far away from your instrument, but also that you maintain the climate to avoid temperature or humidity fluctuations. Once you’ve exposed the keyboard to moisture, the keys or the front rail can become bloated, causing alignment and spacing issues.

• Tight Key Bushings: Piano keys rely on two different pins — a balance pin and a guiding pin— to ensure the key rocks on its fulcrum and stays appropriately aligned. The pins rest inside a felt-cushioned part of the pin. If these felt bushings are too tight, either because they are new or because moisture has made them swell, the pins will not move freely and the key will stick or move slowly.

• A Warped Key Slip: It’s also possible that the key slip has become warped. This causes friction between the key and the slip, preventing it from returning to its natural position.

2. Damaged or Dirty Keys

A well-maintained piano can bring as much aesthetic beauty as musical joy. Unfortunately, with time and improper maintenance, keys can become more of an eyesore than a point of pride.

After years of playing, the oils from human hands can trap dirt that discolors the keys. Moreover, a lack of light can cause some ivory keys to yellow. Some basic maintenance can slow discoloring — keep the keys covered when not in use, but make sure that ivory keys get at least a little light to keep them at their whitest. After playing, use a soft, dry rag to wipe away any dirt or oils from your hands.

This process highlights the importance of discussing your general piano maintenance with your piano technician. While it may seem intuitive to use alcohol wipes or soapy water, these can quickly lead to problems. Improperly cleaning your keys can be just as bad as — or worse than — not cleaning them at all.

When owners hear “cleaning,” one of the most common solutions is to reach for soapy water. Unfortunately, moisture can wreak havoc on your instrument. Too much humidity can swell or warp the keys, turning a minor cosmetic issue into a problem with overall functionality.

Another popular idea is to use household cleaners or rubbing alcohol to scrub away discoloration. This is perhaps the worst option, as alcohol and many solvents will dry out the keys. In these cases, the ivory or plastic casing that covers the wooden key can become chipped or cracked.

If your keys are discolored and beyond a simple wipe down, be sure to consult an expert for recommendations on the best way to treat your piano.

3. Rattling or Buzzing Sounds

When you hear rattling or buzzing sound coming from your piano, it could be the easiest possible fix — or it may mean some major piano work. First, move any object that could be catching the vibrations. Check behind the piano, as well, to make sure nothing has fallen behind the piano. If you’re lucky, you’ll find the noise was only something leaning against the soundboard or otherwise picking up vibrations from the instrument.

Unfortunately, if you don’t have a solution after checking those possibilities, you could be dealing with a structure problem. It’s vital that you contact a technician immediately to diagnose the problem so it does not worsen. Some likely problems will include cracked glue joints, loose bridge pins or loose screws, all of which a capable technician can repair.

Aged pianos can also wear along places near the strings, or even on the strings themselves. Once again, there is little to be done at this point aside from having the piano serviced.

4. Out of Tune

As with all instruments, intonation is vital to a piano’s operation. Unlike most instruments, though, piano tuning requires more than a few twists of a tuning peg or a minor valve adjustment. The good news is that if you’ve maintained and serviced your piano regularly, it should not fall out of tune nearly as often as a guitar or a trumpet.

While age and use inevitably lead to an eventual tuning, your efforts to keep consistent humidity and temperature can go a long way toward keeping your piano in tune longer. One of the most common reasons for premature detuning is the pin block swelling or shrinking due to environmental changes. Not only can this slightly shift the tuning pins, but it can also leave the pins loose in general, meaning they’ll fail to hold intonation even after adjustments.

The dangers of loose pins causing ongoing tuning issues highlights once again the importance of having a technician regularly inspect and service your piano. Neglect or trying to repair the piano yourself can lead to costly and intricate future repairs.

To begin with, many players do not realize that touching the strings or tuning pins with your bare hands will quickly oxidize the metal. Once this has started, rust can set in quickly, and the strength of the string is compromised. The chance of breaking a string or requiring new tuning pins at that point increases drastically.

The oils from your hands are only the beginning of these dangers. Without the proper tools or knowledge of the proper torque, you run the risk of damaging the pins themselves, which would could then require new pins or even repair to the pin block.

It has been my pleasure to help you today, please let me know If you need any other assistance.
Thanks Again,
Andy