I always thought it would be nice to have a stitch eraser but never felt that I needed one. Now, after trying one out, I can see it would be a worthwhile investment. See Ann's Stitch Eraser here.

A stitch eraser is one of those items that you don't need, until you do. Then it is invaluable.

This one is cordless, which is convenient. It also has a narrow blade which allows you to get into tight stitch areas without chewing up a lot of fabric.

Hoop the item you are trimming with the bottom side facing up (backwards in the hoop). Don't pull it drum tight, just snug enough to keep the fabric flat.

There is a slight learning curve. Bottom line, don't over trim. Just guide the stitch eraser over satin stitches. It removes bobbin thread sitting on top without a lot of work.

The thread will look speckled. When you see that, turn the item over and brush the thread away with a fingernail or the end of a seam ripper.