Russo Super H Large Sponge: Tile Grout Clean Up - Tile for Less Utah

Best sponge for grout clean up during tile installation. Tile cleaning sponge in XL size makes cleaning tile easier
It's a sponge.  A really good sponge. Enough said.

Shop Grout Cleaning Tools for Effective Jobsite Cleanup — TileTools

Specifically designed for cleaning grout from larger areas. Long Sponge Life - approximately 5,000 sq. ft! Features: Snaps into place – No Velcro

RTC Products WBRLC 7 x 14 Replacement Tile Grout Sponge Large With Cuts

Goo Gone Cleaner, Foaming Formula, Fast-Acting, Citrus

Troxell USA - The Tile-Setters choice Rounded edge design prevents digging out or marring grout Super-absorbent with premium density for removing

100 Pack XL Tile Grouting Sponges 7-1/2 X 5-1/2 X 2-1/4 by Troxell USA

Goo Gone Cleaner, Foaming Formula, Fast-Acting, Citrus

Clean-eez Grout-eez Super Heavy-Duty Grout Cleaner

Shop Grout Cleaning Tools for Effective Jobsite Cleanup — TileTools

Grout & Tile Cleaner

Shop Grout Cleaning Tools for Effective Jobsite Cleanup — TileTools