If you caught them once, you can catch them again. The eggs are ubiquitous. I do routine maintenance, and I still have a couple of trouble spots, but they are shrinking, and I will keep after them until they are gone, or I am dead, whichever comes first. Anyone who is looking for a silver bullet is going to eventually realize they must wave a white flag of surrender and die, or do the Cure Zone Cleansing Protocol and then follow up with routine maintenance every full moon.