Originally Posted by
zozee
When you put better thread in, did you first take the needle plate off and clean out the lint? The machines are very sensitive to all that. I cleaned mine the other day and was really shocked at the CLUMPS of lint in it. It was jamming a bit before that and I tried EVERYTHING before doing that. Easy fix--lint brush and blowing the lint out with a strong puff did the trick.
Don't blow into your machine ( with your breath or canned air). It just pushes the lint in further where you can't reach it and only the sewing repair people can get it out. Use a tiny vacuum or regularly use your lint brush. Every bobbin change is generally when I do it.