Through reading several articles here regarding DE (Diatomaceous Earth), I have learned it does not do well with moisture. I mixed some in the dust bath spots for my girls on Friday morning, just as a preventative measure (also sprinkled in the coop). They haven't wanted anything to do with their 2 dust bath spots since, and yesterday we got a heavy downpour out of the blue. Is it safe to assume the DE is no longer effective since it was rained on? Also, any idea why they have avoided the spots since?