You could also try to steam cleaning your plants after you wash them and sanitize them. If they aren't super expensive plants, I would suggest replacing them just to help avoid re-infection.
Chameleon Info:
Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
Handling - How often do you handle your chameleon?
Feeding - What are you feeding your cham? What amount? What is the schedule? How are you gut-loading your feeders?
Supplements...