Most of the Cleaner/speed up programs out there do more harm than good.
one of the good ones is CCleaner (The first C stands for a word that is often assoicated with the black tank on your RV) and even this one can do harm if you adjust the settings and do not know what you are doing (By default it does some good, but a skilled user can improve it,, an unskilled one trying to improve it will do harm).
IF you feel the need for a "Tune up" Take it to Staples and leave it overnight.