Don't put monofilament ino your bobbin, it can make a mess.

I had never heard of thread nets before this post. I want to try one.

Ok, how do you get it to stay on when using a horozonal position? Mine keeps sliding off!

Cutting the thread net about 1 3/4 the length of your spool and then threading it down the hole should leave enough in the hole to hold the net in place. Does that make sense? I can take a picture if it doesn't.

Thanks everyone for your much needed help. I tried all the suggestions and they all work. I was using the mono in my bobbin because I ran out of cotton, It hasn't caused any problems so far, but maybe I need to be safe before I'm sorry and I need to make a trip to the fabric store, Oh what a burden haveing to go to the fabric store!!! AS IF!!!

I can use mono in my Elna bobbin but not the Singer. I didn't play with the tension when I tried on the Singer so it may work and I just didn't know enough back then. The Elna is a no fuss, no muss type of machine so when the Singer throws a hissy fit--I usually just switch machines.

Funny me, I just thought thread nets were to put on the spools for storage. Never had a reason to use them during sewing.

Mono stretches and may wrap around the bobbin case. It can really mess up a machine.

something I use instead of the thread nets are cut off tops of socks where the ribbing is and slip that over my spool of thread seems to work as well or maybe better then thread nets. So get your old socks has holes in them cut ther top goes up your leg of the width of your spool thread and slip over your spool of thread. Hope this makes since.