I used my sewing machine for the first time in a long while the other day. It was so dusty that I had to clean it or use a lint-brush removing the dust from that which I was sewing. It took me forever, too, getting into all the little nooks and crannies and whatnot. What a pain.
I remembered seeing something from Martha Stewart about this a while back. Use a tea towel to make an easy cover for your sewing machine.
This particular tea towel was a gift from Hen in Sweden. It makes me feel cheerful to see smiling vegetables.
Measure your towel on the machine first, to see that it will fit.
Cut four equal-length pieces of elastic. You could use ribbons or twine as well and tie a bow if you wanted. 
Tuck under the end of the elastic (or ribbon) and pin it to the hem of the towel. I pinned one at the bottom and one about a quarter of the way up the towel. I did the same to the other side.
Sew the elastics to the hems. You can of course use your machine for this but I did it by hand.
Fold the towel in half so that the bottom and top hems line up. Tuck under the loose ends of the elastics and sew them to the opposite side of the folded towel. Tada! A cover in five minutes.
Ali Does It Herself 