Heat/the sun will destroy your sewing machine!!
Explanation: I had a neighbor call me over to her house because her sewing machine was not running correctly. Sure enough as I tried to turn her needle so it would go up and down, it was as if it no longer wanted to move! I could see that the grease that should be on the machine was non-existent. Long-story short; she had her sewing machine placed in front of her window where the sun would shine directly on it from about noon to sundown. The sun had dried up and warped her sewing machine parts! Her repair bill will now be $60 - $90. So please be careful of where your sewing machine is and keep it away from the sun and heat!