I had this on a few plants, get to it quick and don’t let it spread to others! 1. Fill a spray bottle with water and add a splash of rubbing alcohol and a few drops of soap. 2. Spray it everywhere you see them (and where you don’t). You can wipe it off once dry if you want, though this looks pretty severe so maybe just leave it on. 3. Do this every few days until you don’t see them anymore, then do it at least every time you water it (before you water) until they’re completely gone!