When crocheting lace on hemmed edges of fabric, like pillow-slips or petticoats, try sewing rick rack on the underside of the hem, letting the points extend below the hem just far enough to catch your hook in, instead of working directly in the fabric.

Then when the fabric wears out, as it is sure to do while the lace edging is still good, it is an easy matter to rip off the rick rack, and have the lace ready to use a second time.