My Lelit Elizabeth worked for a couple of years with no steam leaks, but for the last year or so I’ve had a bit of steam continuing to leak from the steam wand after its turned off, which was annoying, and decided finally to sort it out. Started by removing the combi steam tap rod which has the teflon seal at its base. The seal looked ok but had a very thin layer of what was probably minute coffee grains on it. I gently removed this with detergent and a tooth brush, reassembled it, and to my surprise it seems to have stopped the leaking steam. Not sure if it’s a long term fix - time will tell.