Forum Discussion
brinasmemaw
Jan 04, 2015Explorer
We've had that problem a few times too & we have solved it by emptying & flushing out the tanks well & then filling the black tank completely full, adding a cup of bleach. We let it sit for about 20 mintues or so & then drain, no more flies. Someone once told us that the flies stay at the top of the tank & fly out as soon as the toilet flap is opened & that appears to be true. The flush with bleach water does the trick every time for us. Hope you find something that works, that is indeed yucky when you know for sure where they came from! Becky
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