Ok guys, I went out to radioshack today to see if I can get some electronics part spray, so I get out there and the only can of the stuff that I might be able to use, has a brush on the tip of it

its a friggan electronics part spray, WHY DO YOU NEED A BRUSH ON IT?!? Anyways Anybody have any suggestions where to go and what brand of spray to get, I know how to clean off the sensor, now all it comes down to is what type and name of spray that I need.