I refuse to pay $100 to have my machines cleaned. They are out of warranty so I don't worry about voiding one. I have had the covers off the machines (even the computer machines) to expose all the internals and clean them all. I don't actually touch the electronics; when the guts are totally exposed I blow them off good with medium-low pressure air from my compressor. DH spent a career repairing nuclear reactor electronic controls for the Navy and he supervised my first few cleanings until I felt confident enough to do it alone.