How to maintain your piano and the most common piano services. Due to humidity changes and how often the piano is played, pianos must be maintained and serviced annually. To keep your piano in tune, piano manufacturers recommend that the piano be tuned 2-4 times yearly. Piano cleaning is highly recommended. This service includes cleaning the soundboard, strings & under the keys every five years. Action regulation & lubrication are significant factors in your instrument’s performance and life span. ( every 3-4 years )