Have you tried the bobbin genies? They a little silicone washers you put in your bobbin case. I use them in my Janome. I also sometimes put my top thread on a thread stand and that helps with certain fabrics and threads. The teacher in my FMQ had never heard of that but it helps sometimes on my machine. I know you can purchase the bobbin genie washers from Leah Day. See if there are any tips on her site. I used to use a throat plate on my machine with a single hole in it. Hope yu figure it out. Or go back where you purchased the machine and as for help.