Not sure if VIA is advanced enough for that. If you're on Windows AutoHotKey might be the solution. You can also submit a bug report at VIA's github page.
There isn't a space where an icicle can grow, but you can't reach it. If an icicle is inside a sliding window there is a high chance you can't reach it. Tilting windows also (mostly) prevent the rain from being blown inside the room.
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