Natural cleaner for my acrylic low pile Ikea rug?? Mild dirt plus I spilled the ashtray.?

Question:I'm looking for a cleaner that I can make from my household products (baking soda, vinegar etc.) to clean the dirt and ash stains from my low pile super brightly coloured (think neon) Ikea carpet. Pretty sure it's acrylic. The stains aren't bad, but they just look like dark patches on the carpet. Dirt and ash from spilled ashtray (ground in a bit). Any suggestions?

Answers:
Actually water should take most of it up--vacuum first (which I'm sure you've already done...) to get up most of it. Vinegar can't hurt. But make SURE you have an acrylic, and not a dyed wool, rug.