Used to do the same. Thankfully there are glass splatter guards out there, some of them with plastic handles on the outside. More expensive than you would hope

Used to do the same. Thankfully there are glass splatter guards out there, some of them with plastic handles on the outside. More expensive than you would hope though, I suppose because it's such a niche use, but it's not as if you're going to be buying many glass microwave covers in one's lifetime!