Yep. It was me.Can't remember who it was that's just using cloths now for grouting.
I've bought some Costco ones now but haven't used them yet (there yellow in colour). Just waiting for the blue Screwfix ones to run out.
I don't find that they clog up. If you fold them in half and then half again you then have 8 passes of a clean cloth to wipe across your tiles.
I just couldn't get enough water out of the washboy sponge........I nearly fell into the bucket a few times after trying to remove excess water from the sponge on the rollers!