I had been remiss on my routine maintenance on my embroidery machine (oiling). The other day the bobbin case was emitting a horrible noise sounding like the case was loose and the bobbin sounded like it would pop out. I cleaned the dust out and tightened everything up and it still made the noise--awful! Then I thought to myself--"When's the last time you oiled it?". Well long story short, a little oil and now it sounds like the day I got it! So that's what I'd like to contribute to this post--remember proper maintenance.