bathroom with green tile floor
Photo: Paul Whicheloe
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9. Brighten Tile

Refresh a vintage tiled floor, such as this unglazed Art Deco–era yellow-and-black porcelain mosaic, with an eco- and homeowner-friendly acid etcher that removes ground-in dirt from the surface and grout lines.

Green Envy Muriatic Acid Replacement, about $7 per gallon;
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