100 knock-off magic erasers at a fraction of the normal price

I've written about melamine foam (sold as Magic Erasers) before. They're great for quickly removing mars, scuffs, and stains from almost any surface. I recommend buying 100 at a time.
Latest use case: Some old stickers on my laptop that I wanted to remove. After peeling them off, the sticky, tough, adhesive remained on the laptop. Magic eraser knockoff to the rescue! It took about 90 seconds of gentle rubbing with a damp magic eraser to remove all traces.
Before:

After:

Watch the video below to see different ways to use this wonder material.