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Are you going to reseal them? It probably just has a weak seal somewhere. Hope thats all that needs to be done because I was actually considering getting a set.
Are you doubly sure that the bulb is sealed properly on the back with a rubber washer? That is the easiest way for moisture to get in. The lil pin-size hole is supposed to be there to HELP make it not fog up. There is a leak bigger than that somewhere.
^ what he said. I just cant see that pin sized hole causing your issue especially since you claim it came with the hole there. I am thinking that that hole must be functional and that there is a sealing issue somewhere that is not immediately noticeable.