Had it not been for the recent 20% off sale on everything on AG I would probably be using a couple of bissels and an assortment of carpet/upholstery cleaners. I had done a few really bad interiors with just a shop-vac, towels/rags, hot water in spray bottles(most won't last with too hot of water), WG Spot Elim. and Upholstery&Carpet, and DP extractor pre-treatment. While I got above average results and better than I have seen some people get with actual extractor like LGM, it took way to long to keep doing it that way. The Aztec I have now made quick of work of tough jobs since since I have had it. While it has not quite paid for itself yet(depending what I say is paid off from my profits so far), I hope to get rolling on interior work soon to make it really worth having around. I was going to buy a refurbished Bissel LGM from a local bargain outlet(Ollies) as it was only like $60, but realized my Aztec didn't need a companion.lol
The keys to cleaning carpet and upholstery stains is early removal. It that's not an option as with vehicles that are not your own then a thorough vacuuming and a pretreatment are in order. Follow the recommendations for the pretreatment product by allowing the chemical to dwell for several minutes. I then hit the pretreated area with hot water to further activate the chemicals and gently scrub the area as to agitate, not to push the stain back into the carpet/uphlst. Allow the area to sit another few minutes then blot the area with a terry towel to remove the stain/dirt particles from the surface. Follow the blotting with a thorough vacuuming to remove the moisture. Allow the are to dry before attempting to clean again; this allows you too see actual results when dry and allows residual chemicals, stain and dirt to wick to the surface to and be dry vacuumed away before doing another wet treatment. This practice works especially well on berber carpets or anything similar to berber with a tight wound fiber/yarn. With upholstery and tight wound carpet fibers it is best to use a minimal amount of cleaning agent/chemicals and preferably with low/no foaming agents and fragrances in them, i.e. 303 carpet/fabric cleaner, folex, DP extractor pretreatment, and/or vinegar. In most cases the best method with carpet/upholstery like stated is to dry clean(vacuuming and brushing), misting the area with a cleaner like stated, then lightly spray with hot water, a few minutes dwell time, then blot to remove majority of stain and chems, follow w/ vac. If an area has been previously treated with chemicals and is still stained then do the following method with out applying another chemical. This is highly recommended for a berber carpet(which I recently cleaned in a home and a car's floor mats). Hope this was helpful and not more than what this thread was asking. Just passing on info that has worked for me.