It's ok - if you apply very frequently.
Posted by 4939683640943578886 on Aug 04, 2014
I bought this product for a recent camping trip in New Hampshire. After a lot of rain, and with extremely hot temperatures, this year was the worst black fly season I have ever seen. I noticed that this product worked, but only if applied frequently - VERY frequently! After application, the flies were still all around me, but I got bit less frequently than if I forgot to apply.
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