Corrected entry: The movie takes place in winter. With all the snow on the ground wouldn't the snow cause the gremlins to reproduce due to the water content. Even in Dory's bar, the gremlins spill beer and other drinks on themselves, don't those drinks also contain water?
Corrected entry: The town of Kingston Falls is covered in snow the entire film. And it's established that water makes the mogwai and gremlins reproduce. but throughout the film, we see gremlins moving through the snow on at least several occasions without becoming wet and sprouting more gremlins. We even once see a gremlin submerged in snow, and still - no new gremlins. The film shows that only a few drops of water will sprout a new one, so it just doesn't add up. You could argue that gremlins might be cold-blooded, and thus wouldn't melt the snow enough to get wet, but this would contradict the several moments on-screen where gremlins go from inside warm houses and buildings directly out into the snow - where residual heat should melt the snow and produce more gremlins. Just another example of the whimsical rules not quite adding up under scrutiny.