Since my first motor went after just a year, i have been very diligent in my care of machine. it is kept in my garage(where my cental heating boiler is sited every night wont even pre load van the night brfore so as to avoid getting damp even in summer, alway use defoamer both up hose and in tank and yes i run the motors after every job, i personally i feel i have done every thing poss to maintain my machine within reason, . i have a karcher wet dry vac that ive had for years that hasnt had a 1/4 of the pampereing this machine has and a lot more abuse and starts on the button every time. if these motors need to be maintained in a certain way the supplier should furnish us with a care guide.