"They" do sell beer lube for that.I have the opposite problem with mine. If I tighten it too much, can't get the bugger open again without twisting the screen body. I put some FS grease on the threads last time, which helped. Not fond of using that stuff where it can make contact with the beer, but sometimes I don't find an alternative.
Next time don't do it up so much lol it don't need to be water tight