If you aren't going to clean the IC correctly (ultrasonic), keep in mind that you have to purchase the cleaner, that entails $$$ and going somewhere. To clean it correctly will require at least a quart or two of solvent, and you have to buy it.
You should get some sort of rubber or neoprene caps and hose clamps to keep the solvent inside so the cooler can be inverted and agitated in all orientations vigoursly for ten or 15 minutes while partially filled with the cleaning solvent.
Then you have to safely and legally dispose of the now dirty solvent.
And the cooler still won't be as clean inside and out, as it would have been if soniced.
Or you just go to a place with a ultrasonic cleaner, and bring the IC and your TB (remove the TPS and IAC) and get both done much cleaner and easier than with solvent.
Or come up with more elegant solutions to an easy fix.
TIMINATOR