CarrieReneHall

I have done everything and cannot figure out why - at random times - my bottom stitch is loose. It seems to happen more often when I am sewing my leather onto my zipper (handbags). I am wondering if it is the glue I use to get the leather in place. I did not have any issues with this until now. I am desperate for some help. I have so many orders and cannot send these out like this. I will take any advise! I am using leather glue and not very much of it.