Hi, and welcome to Just Answer
I am Martyn, here in Australia. The "Expert" community at Just Answer are not on JA Staff, we are Technicians and Professionals from across the globe, many with our own businesses to run, as well as spending time to help with Q&A on JA in our "spare" time. We appreciate and rely on your honest positive ratings.
Admin will address any broader concerns and questions about billing and site use, we are just here to assist with the Tech side and the specific Q&A
Probably an issue with thread or lint in the top tension dials
Floss between tension discs with clean strip of fabric to remove any buildup (Flossing like you do your teeth)
If you have a post/zipcode I can make some suggestions for local assistance if needed
Let me know how you get on, and please get back to me if you have any other questions or concerns and I will try help you more.
If you feel that I have helped to answer your questions please remember to rate my performance positively before you leave so that we can close the file as it is the only acknowledgement we receive for our time and experience.