Airtight waterproof hearing aid dryer (or, really, for any other small items)

Step 9 Fix fabric to baggie

This step is optional, but it will make the next steps a bit easier. If you have some temporary spray adhesive (such as quilt-basting spray), spray a light layer of adhesive on the wrong side of one piece of fabric. Then lay the fabric back down on the baggie, and press lightly with your fingers to smooth it out. Repeat this step for the other piece of fabric.

This will keep the baggie from shifting while you're binding the edges.