I replaced my shower arm with one that has a universal 1/2" male end so I could install a Culligan water filter showerhead. I did a fair amount of research beforehand and made sure to teflon tape the ends in the direction I would be screwing so as not to unravel the teflon while screwing. On the outer end of the shower arm, there is a tiny leak that, after about 10 seconds, forms a single drop that falls from the head and then repeats after another 10 seconds. I have tightened it as much as I can, and it seems harmless, but I have no idea.
Will it get worse? And is there anyway to know if I am leaking on the other end, inside the wall?