I had worked out how to sew swimming costumes made with nylon lycra/spandex fabric. I sprayed a piece of cotton wool or fleece with silicone spray and placed it under the thread on its way to the needle. This just sewed fine with no skipped stitches.
This doesn’t work any more 🙁 I can attach the elastic with my overlocker no problem, but when I turn the fabric over to topstitch on the sewing machine it misses stitches badly. BTW I don’t use regular elastic (the cotton covered stuff), I use what is called swimwear tensioning tape – it’s what you’ll find if you pull a commercially made custume apart – it’s just a strip of thin rubber, and it sticks to the needle like mad. Thinking about it, it’s possible I’m using some from a slightly thicker batch…hmmmm
I’ve tried all sorts of needles with the silicone but nothing works well. What works for other people?
I have another option too – I have a coverlock machine that would probably work but it’s so clumsy I don’t want to get it out of it’s box – I should do this it’s probably the anwer to this and a load of other problems.