The best way to clean up spilled paint is to do it immediately. Do not let the spilled paint sit on the carpet. Use a plastic putty knife to scoop up as much paint as you can. Then, mix a solution of warm water and dish soap — 1 cup: ½ tsp and dump it into a spray bottle. Spray the stain with the solution, then run a wet/dry vac over the area without waiting. You can repeat this process as often as needed until the stain disappears.