Every one has probably seen or at least heard off key leaves for sax . Blocking open 2 keys down by the bow . I made my own out of dense scrap foam rubber ,and started to block open all of the keys ,thinking the ones closer to the mouth piece get a lot of moisture also . Run a swab set them and leave them in for an hour or so, sax out of the case, this is at home of course . My question being does this wear out springs and is it overkill ? The saxophones I have purchased seem to have the pads closer to the mouthpiece in worse condition than the rest , has any one else noticed this , thanks in advance