Originally Posted by
bearisgray
Acrylic rulers do "wear down". When it no longer is an accurate tool, GET RID OF IT! Do not donate it. Put it in the trash.
It took me a ridiculous amount of time to figure that out. Duh!
Don't throw those square rulers. They are good for after pressing quilt blocks.
I place my OLD square ruler over my blocks after pressing. Gives it a little
steam and makes the block flatter.
I know some quilters like to use a clapper but I haven't seen the need.