Ya I had the same problem with a chocolate ice cream stain in the fron pass seat. I first just used water with no luck then stem cleaned it which did take the stain out but left a horrible line at the edge of where i cleaned. I was pissed, it looked like crap. So finally I talked to the ZEP products rep who comes by my work and he gave me a bottle of Zep OXYSPRAY to try. It kicked ***, just sprayed in on evenly over the whole seat and after work whe i came out it was like new, I would highly recommend it. GO to
www.zep.com and the product number is #0828. One tim though, when you spray it, spray the actual stain a few times till it is saturated and then spray the surrounding areas so you dont get any "rings" where the product was used.
I believe that there is something about that damn fabric that makes stains show up easier. On my F150 I could just wipe stains like ice cream etc away with some warm water, the tacoma is a whole different ball game.
Check out that product though.