I normally use Bel Ray waterproof grease on my throttle assembly, but since it's gotten colder the grease hardens or something and causes the throttle to stick. Is there some thinner type of lubricant that works better on throttle assemblies? I'm pretty sure it's not the cable because i cleaned it with carb cleaner and sprayed it with WD-40 a little while ago, and the bike hasn't been used more than twice since then.