Kleenest magic eraser: same trick, different box

Here is a small secret about magic erasers: most of them are very similar. They work like an extremely fine sanding block, wearing away marks rather than dissolving them, which is why you only need water.

Kleenest's pack of four is listed as chemical-free and aimed at walls, kitchens, bathrooms and shoes. Small sponges are handy for corners, switch boards and the grubby edge of a door frame.

What to know before you start scrubbing:

• The sponge wears away as it works, so a big wall can use several
• Rub too hard on glossy or painted surfaces and you can leave a dull patch
• Always test on a hidden spot first

If you already have a brand you like, compare the price per sponge and keep using whichever is cheaper. Read side by side with the Happi Planet pack, the two listings promise much the same thing, and with these sponges technique matters more than the logo.