Lambo1,
Congrats on the Extractor purchase; I have a Mytee HP60 Spyder, and love it. Have found that low foaming cleaners work best, and Meguiar's APC Plus fills that requirement perfectly.
My other go-to product is Meguiar's Quik Out Carpet Stain Remover; which is a product that Meguiar's and Bissell made together. this product will foam a little more, and foam is not the best coolant for extractors, so you want to be more careful using it, so you dont hurt your extractor.
I tried commercial carpeting cleaners and found they didnt really work that great for automobiles, and ended up costing much more, had to be mixed from powders, and are generally at least in my experience, old technology compared to what I mentioned above..
Get a gallon or 2 of distilled white vinegar, to occasionally run through your machine and tools to keep them clean internally; just be sure to rinse it all out completely before you do your next carpet cleaning job.
Prepare to be stunned at the amount of dirty water thats in your recovery tank that comes out of carpets and mats that seem really clean!


I have personally found that clean carpeting and mats, contribute to the overall "healthy air" you breathe in your car, and not kicking up all that fine, almost impossible to remove dust around in your car seems to cut down on alot of sneezing, and stuff in the car.
DanF