Shoutout to the guy at the repair shop who changed how I clean heat sinks

I was swapping a thermal paste on an old Xbox One last weekend, and the guy behind the counter at the local shop asked me what I used to clean the old paste off. I said isopropyl alcohol and a coffee filter, like always. He just laughed and said I was making extra work for myself, then handed me a bottle of 99% isopropyl and a soft toothbrush. He explained that the brush gets into the tiny gaps around the heat sink fins way better than any cloth, and it cuts the drying time in half. So I tried it on my next repair, a PS4 that was overheating after 20 minutes of gaming, and honestly it saved me a solid 10 minutes of scrubbing. Has anyone else switched to a brush for this? I feel like I was doing it the hard way for years.

2 comments

2 Comments

sethanderson6d ago

I tried the toothbrush method last month on a dusty laptop heat sink and it peeled off six year old paste in about two passes. Did you notice any risk of the bristles leaving microscopic scratches on the thermal spreader compared to a soft cloth? I worry about that with cheaper brushes that aren't labeled as anti-static or soft tip.

wade_hall6d ago

Honestly @sethanderson, are you sure you're not overthinking this? Ngl I've used a dollar store toothbrush on a dozen builds and never had an issue. Unless you're scrubbing like a maniac, the bristles are way too soft to scratch a metal heat spreader. Even cheap plastic bristles aren't harder than copper or nickel. If you're worried about antistatic stuff, a wooden toothbrush handle won't build up charge anyway.