Spinergy Resuscitate from Bridgepoint Systems is a professional strength, acidic formula specifically formulated for use on stone, tile and grout that does not respond to other cleaning agents.

“Resuscitate is used when all other cleaners have failed, and is a safer alternative than aggressive acids like phosphoric and muriatic,” the company said. “Spinergy Resuscitate will readily remove the embedded soil layer thereby renewing the surface of the grout.”