u/Hungry_Tennis_5166

Image 1 —
Image 2 —
▲ 6 r/cactus

It was only on a couple now it's on most of them. I made them dryer for a bit but it still didn't go away. What is it, what can I do to save them, and what can I do for the future?

u/Hungry_Tennis_5166 — 7 days ago