I've search this site and read countless reviews on both CW and Amazon and I can't see which one is the best. Which chemical do you think does the best job and why?
The best chemical.. Hydrogen Hydroxide (Another way of saying Water).
Seriously. Short of some very nasty stuff nothing is going to clean the sensors off and make 'em work. and it's the gray tank that stinks to high heaven, not the black, (Yes it smells bad but not nearly as bad).