parts cleaner
For cleaning parts, instead of brake cleaner which has chemicals that are very bad for you, use 70% isopropyl rubbing alchohol. $1 for a bottle at any grocery or drug store that will last a year. It isn't toxic, and doesn't dry out your hands. Just don't drink it.
It's not so good for cleaning motors, but for parts and bodies, it works great.
R/C racers are so quick to buy "specialized r/c products" that cost 5x times.