I have good experience with Arctic Silver 5. The moment I get a Processor with default heatsink, I wipe the compound and put AS5 and forget about it. Same goes with OEM + After market Heatsink. Always use ThermalTake or CoolerMaster high end ones. I am doing this for about 3 years now. Lately I am seeing reviews on Newegg about AS5. People (reviewers who buy processors especially Intel) say they dry out and heatsink is left with nothing. Is that true? Is it safe for long term applications? Especially is it good for HOT and HUMID places? Athlon XP mobile 2400 + overclocked to 3400 + (with a high end ThermalTake cooler) on A7N8X-E Deluxe has seen 2 winters and 1 summer. Last Winter the temps were 20/45 (idle/load). Summer - 35/57. This Winter the temps were 34/52. Its spring temps seem to go up. Should I re-apply every year I have my HTPC with a Sempron 2600+ (64 bit version - Palermo E6 revision) on Abit NF8 (I think) overclocked to 2400 Mhz at 1.55 v with default heatsink + themal pad (didn't really care for AS5 as I got both for $45 all new on a clearance sale) all in a Media center case with 2 small quiet 60 mm fans. Idle/Load 24/32 (winter), 30/38 (Summer). I am building a new one for my brother. Unfortunately got a open box Processor which has little default thermal pad left. (Sempron 2800+ 64 bit version) Should I put a drop of AS5 and don't clean the pad and put the heatsink? What will happen if I mix like this? Help.