soleniod troubles

having problems with my starter soleniod. im going through them extreamly quick (only took me a day to fry one about two months ago) my power wire to the soleniod is starting to melt off the rubber sleeve. i believe i have something grounding out or i might have the wrong soleniod, just want to see if you guys think of anything other than what i thought. :shrug:
 
Which power wire is melting through its insulation (there are many on the solenoid, as it is a power distribution block of sorts)? I was going to assume you meant the battery cable, but the alternator cable is a power (feed) wire of sorts too.
 
Is the battery cable of insufficient gauge? Stock is 4 AWG IIRC.

Otherwise, I would look for a loose connection (which can heat up cables) or an issue with the battery. The former is probably more likely than the latter.

Good luck.