Mites (not spider mites)...?!

[estación seca]

I use alcohol 70% OR soap. Rubbing alcohol as sold at drug stores is usually 70%. Sometimes it's 90%. I have used 90% only on warm days so it evaporates quickly.

In a coolish, humid environment I would probably use the soap first, so the alcohol didn't linger to kill the leaves, but I don't have that. I use alcohol for smaller applications, and soap for larger, due to the cost difference.

Edit: I use isopropyl alcohol 70% because lower concentrations didn't reliably kill them. I use isopropyl alcohol because that's sold at every drug store and market in the US, and cheap. I think rbarata uses ethyl alcohol because isopropyl is hard to buy in Europe. There might be a difference in killing between the two but I haven't compared them.

The only ethanol sold in the US to the general public is sold for human consumption. (There was at one time a famous goat at the store in Big Bend National Park that would drink beer offered by tourists. It held the bottle in its lips while tipping it up.) Ethyl alcohol in the US is very much more expensive than isopropanol.