Apologies, Atlanta....I was trying to be helpful, and as J and I both said, tapping on your finger is a quick way.....can't believe there is a quicker one.
Why would you need to do all that sewing, washing, ironing endless times?
If you're using a sharp on knit it usually starts to snag straight away unless you are lucky then it doesn't matter.
If a fabric requiring a sharp starts to skip stitches you are using a ballpoint.
You can hear the difference but I can't describe the sounds on here.