Lately I've been having trouble removing some stains and some stains re appearing on my interiors details.... I always have to scrub brush and wipe to finalize my detail...I been feeling like my machines are just taking up time and room in my van I been wanting to do everything by hand or da machine with brush attachment (works awesome) does anyone else use machines? i have a steamer and extractor and always pre spray ....steam floors and extract seats what are your methods on interior details? My exterior details are very good I think interiors are my weakness ...please help!