Waldorf Blofeld is amazing little digital synth with almost endless possibilities. Unfortunately the rotary encoders seem to start skipping and failing sooner or later. After couple of years of light use my unit started failing too and it became very annoying to use. First Try I first tried to open one encoder and clean it from inside. It worked ok but these components aren't really meant to be opened and closed again and I never managed to put it back together properly. Encoder shaft was loose and wobbly and it would have failed again soon because the encoder wasn't tightly closed. Proper Fix Luckily it's possible to fix it properly as long as you know how to solder. Current price for the full set of encoders is less than 7 euros. I ordered new Bourns encoders from Mouser: 1 pcs of https://www.mouser.fi/ProductDetail/652-PEC16-4220FN0024 for the main encoder, this one has detents so it "clicks" when you turn it. 6 pcs of https://www.mouser.fi/ProductDetail/65