Linda,
My collection kind of got away from me the past two years while a took care of a fatally ill family member. I just repotted the whole collection and divided and threw away a lot of the infested parts and kept the parts with small infestations or no infestation. Each plant was thoroughly cleaned and sprayed during the repotting process. The spray I used was
a home made concoction of "Dog flea and tick Shampoo" Acohol and water - no kidding. 4 months have passed and the plants look clean but are inspected often and resprayed when the stuff starts. By the way I used 3000 pounds of potting mix and a lot of new pots - it was not a small effort.
Be sure and disinfect your hands between plants-----
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