Amazon has the 3-Pack of Scotch-Brite Delicate Care Scrub Sponges for $3.32 - $0.95 off coupon (check “Save an extra” box, eligible on first S&S order for this product) = $2.37 with free shipping on $25+ or with Prime (extra 5% off with 5+ items S&S order).

Safe to use on glass, crystal, windows, tiles and countertops.