1330 overheats in hot weather only

My 1330 laptop (with 8400m graphics) seems to overheat and become unstable when the ambient temperature is high. In the Bay Area where I live it is generally fine, but on a couple of recent summer trips to Phoenix and Vegas the hot weather made it unstable; it would often run very slowly or just crash continuously. I've also seen this instability during a recent spate of hot weather here in the Bay Area, and it also happens when I try videoconferencing with skype even in mild weather here. I assume the videoconferencing just stresses the hardware more than anything else I do (I am not a gamer). It seems clear to me that this is a heat issue, but because it usually manifests while travelling not at home, a fan pad doesn't seem like an appropriate solution.

Any suggestions for how to keep it cool or otherwise solve this?

I recently had the motherboard replaced on the 1330 under warranty when the graphics card died, and the problem still occurs, so I think this is just the nature of the beast rather than a defect with my particular boards.

 

Have you tried running a temp monitoring program? - google HWmonitor

 

allready tried cleaning it? blow all the dust out.

 

heatsink mod and /or laptop cooler