Home Depot sells a small shop vac - about $30 - that is a real workhorse. Stinger or something. They double as a wet-vac, you need to take the filter out, just a paper thing held on by a large rubber band. Has a little float ball that keeps rising liquid from entering and damaging the motor. I use it on carpet all the time as sort of a poor man's steam cleaner. Use whatever soap you have in mind, and I second hand cleaner and Dawn, agitate and then apply hot water, agitate again and vacuum it all up. Repeat. And repeat again.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K