This is perfect for every time you wash your bike! I pull the air filter and put in air filter block off and then spray this inside the air box and let it soak for about 3 - 5 minutes and then pressure wash it out! Keeps the inside of my air box clean and helps remove any oil from the air filter that may be inside it!
It works as advertised, but it's not as effective on NoToil residues as I would expect it to be, considering it's a NoToil product. So it's a good cleaner and does its job, but it does not dissolve NoToil "oil" like the dedicated NoToil powder.
I've been frustrated with No-Toil stuff because of the gunk in the air-box that was hard to clean with normal stuff. This product breaks it down quickly.. like contact cleaner works on the old oil-based filter treatments. Try it.