This problem can occur if dust or dirt gets under the keys and contaminates the touch sensors.
You can try using a vacuum cleaner or compressed air to help clean under the keys, however the best method is to disassemble the keyboard and use electronic contact cleaner to thoroughly clean the sensor pads.
This is a common service request, and a local repairer should be able to carry it out for you.
Let me know your zip code and I can recommend a repairer in your area.
Hi, just checking in on your question, do you need any further assistance?