Holy moly, I normally use a drill for vent holes on tubs, but I decided to order a cheap soldering iron on amazon to try it, and it was so much cleaner and easier. I mean I've seen posts that suggest using them, but it was not clear to me how much better they work than drilling. I feel like a new world as been opened to me. It was way faster and no worries about damaging / cracking the tub. I have to make a lot of holes in the tub to keep the humidity low enough, so when drilling, it's a guarantee I'll go a little to fast and crack it, so this helps so much.
This is the one I ordered: https://www.amazon.com/gp/product/B01N413T8U
$10! And the tip is about the same size as what I'd normally drill.
Rant over
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