I just tried some Connecting Threads Essentials for LA and was very surprised at how nice it was to work with, top and bobbin. Some of the best stitching so far and very little lint. I usually use King Tut. I always use W&N batting. It works for me so there has been little interest to try anything else.
peace

I have been told to never blow into your bobbin area, because of moisture you might blow in there.

Superior Threads BOTTOM LINE or SO FINE work great for bobbin thread.

I've read that using canned air is good and that using canned air is bad for your sewing machine. The reason for it being bad is that it blows the lint/dust deeper into the machine and eventually clogs the machine. The reason it is good is that it cleans the dust/lint out of the machine. During my reading, I've never seen a reference to canned air starting a fire or blowing moisture into the machine, though.

Cleaning with a little lint brush works well and no worries about canned air!

I just purchased the Glide thread from Bobbin Central. I quilted a king size quilt with my Bailey, and had no lint. I checked the bobbin area several times when replacing the bobbin. I was great to quilt with.
Mary in TX

Thanks for the helpful advice. It's always good to hear the experiences of other quilters. We will both be giving some of your suggestions for threads a try.

Along with the problem with canned air if you blow into your machine, even with your breath, you can lodge the dust deep inside it. I ordered a small attachement set that connects to my vacuum to clean it out. I love Aurifil, low lint and good strength. Plus when quilting on cotton its better to use cotton thead if you want it to last longer.

I would recommend either Aurafil or Essential Pro from Connecting Threads. On my Bailey, I use mostly Essential Pro. It is a 70 wt polyester, and works great in bobbin and top. Plus, Essential Pro is priced right.