We have a serious problem! We have been battling gnats by the hundreds. We have tried treating our tanks opening and closing them putting chemicals down the drains closing the drains caulking in areas that we thought might be allowing them in and we are still at a loss as to where the heck they are all coming from. Iím kind of wondering if, they are in our ceiling and maybe the air condensation from our air conditioning unit could be attracting them and offering a nesting ground for them? Or if the windows are just not sealed well enough in this RV that they are still finding their way in? And I promise Iím not exaggerating , when I say by the hundreds, I probably kill 100 a day between sticky traps flyswatter bug sprays. Smashing him with whatever lol. We do live in our Rv and are so frustrated with this. Any help advice you can give it would be greatly appreciated.