My sax was playing fine earlier, today I take it out after school and play it, and all my low notes are sounding muffled, like someone put a towel in the bell of the sax. I guess something happened to it in the case. Also's it squeaking more too.(which it never squeaks) All this happened shortly after I a started playing 3 strength reeds, I don't think thats the problem though. Normally the low b flat will sound loud, now it sounds quieter and muffled then all the other notes. I don't know what happened