I have one pillow that the case comes off of each night. I don’t want to use a safety pin because, even if the risk is low that it would come open, it is right there by my eyes and ears.
Any ideas on how to keep it on?
Hmmmm. Don’t know how handy you are with such things, but could you get some of that Velcro-type stuff that irons on, and iron it onto the open ends of the case, and just close it up with Velcro?
Or, if it’s a specific pillow causing the trouble, not some inherent problem with the case, maybe a pillow sham would work better on that pillow than a case?
They make some pillow cases that are kind of clamshell in design, rather than being open at one end. You insert the pillow in a slit in the middle instead of one end.
Sewing on a button or two seems easy.
You could use one of those allergy pillowcases that has a zipper.
Snaps are really easy to apply, and cheap - I just use a hammer, though you can buy special pliers to attach them too. They stay fastened really well, and you don’t have to buy new pillow cases.