Stain removal through novel oxidizer and chelant combination

A method of using a detergent composition comprising:

• contacting a ware with a warewashing detergent use solution consisting of:
• water,
• alkali metal carbonate,
• chelant that is methylglycinediacetic acid and optionally glutamic acid N,N-diacetic acid and/or alkali metal tripolyphosphate,
• alkali metal percarbonate,
• a peroxidation catalyst according to formula (XIX) or formula (XX):
• and
• optionally one of the compounds selected from the list consisting of silicates, detergent fillers or binding agents, polyoxypropylene-polyoxethylene block copolymer nonionic surfactants, enzymes, dyes, odorants, aminotris(methylenephosphonic acid), and mixtures thereof;
• wherein the molar ratio of chelant to alkali metal percarbonate is in the range of 1.8 to 3.4;
• wherein said molar ratio is calculated based on the total molar amount of methylglycinediacetic acid, glutamic acid N,N-diacetic acid, and alkali metal tripolyphosphate;
• wherein for the purpose of calculating said molar ratio alkali metal percarbonate is assumed to have the formula 2(M2CO3)·3H2O2, where M represents an alkali metal;
• and
• wherein the detergent use solution does not comprise manganese oxalate and does not comprise a polycarboxylate polymer;
• and removing tea and coffee soil from the ware.