Never spray liquids on a warm engine or any sevos or electricalconnections,let cool first. WhatI prefer to use is inexpensive and cleans well You can purchase it at any store 91% or less Isopropyl Alchohol diluted w H2o water10ozorsoof alcohol to 20oz or so water cleans very well making sure not to oversoak any rustable surfaces i tried Denatured Alcohol and learned that it is to expensive and does work as well. See my other upgrades and ideas that are in use all overas we speak, www.catbob07.rcuniverse.comany questions at all feel free to ask. Astupid question is an unasked question no matter how small. catbob07. Keep on Keepen on.