Originally Posted by abdconsultant
take any lint, fabric or stuff out from around the bobbin case. If you have your manual use it. I alway keep the manual to my machines and occasionally have to reread them. If you don't have your manual, order one on line.
Rethread your machine and replace the needle. that is a good place to start once you've cleaned it.
good luck.
I've found with my new machine I have to clean it out after so much sewing. It starts to make noise and the stiches get weird. Usually I clean out the lint, blow it out with canned air and re-thread, good as new.