Name: Anne Summerville, SC (Zone 8a) Only dead fish go with the flow!
You need a duster for DE .. I didn't care for the little 'pump' ones because they throw out great gouts of powder so I ended up buying one that was rather expensive but creates wonderful clouds of DE that cover everything! Expensive but worth it. You definitely need to be above wind when you use it or wear a mask if it's in an enclosed space. Here is a link for it.
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.
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