never used solvent washer but I have a smart washer that uses ozzy enzyme's to eat the grease and gunk off and only use it when its time for a rebuild {it leaves your hands soft for the wife} other than that just compressed air soapy hot water good rinse. if I resurface the clutches {only if I blow a belt or see rubber buildup} I use scotch bright working from outer edge to the center and acetone on a rag all ways trying to avoid all bushings and finishing again with compressed air.