i wouldn't bother wayne, if thats the way the carpet has always been cleaned then chances are your gonna make it look worse. dry cleaning is okay one or two times but eventually that crap builds up in the pile, you can never vac it all out. unless you got something like a flexi 5. all though i'm sure some on here will say different, i'm just going off what customers have told me when ive wet cleaned after they have had dry carpet cleaning for a while.