Toilet bowl detergent system

Claim 1

A block detergent composition for keeping a toilet bowl clean comprising: (1) a cleaning system comprising: from about 10% to about 90% of detergent surfactant of the amphoteric type wherein said detergent surfactant has the formula: R-C(O)-N(R.sup.2)-(CR.sup.3.sub.2).sub.n -N(R.sup.2).sub.2.sup.(+) -(CR.sup.3.sub.2).sub.n -C(O)O.sup.(-) wherein each R is a hydrocarbon group containing from about 8 to about 20 carbon atoms, each (R 2 ) is either hydrogen when (R 2 ) is attached to the amido nitrogen, or short chain alkyl or substituted alkyl containing from one to about four carbon atoms, each (R 3 ) is selected from the group consisting of hydrogen and hydroxy groups, and each n is a number from 1 to about 4, with no more than about one hydroxy group in any (CR 3 2 ) moiety and from about 10% to about 90% of polycarboxylate chelating agent; and (2) system for providing a concentration of from about 1 ppm to about 1000 ppm of said detergent surfactant and said chelating agent in the water of said toilet bowl, said system being a dissolution retarding system which comprises a mixture of (1) cellulosic material that is selected from the group consisting of hydroxypropyl cellulose, hydroxyethyl cellulose, and mixtures thereof, and (2) polyethylene glycol, or a polymer that contains a major percentage of polyethylene glycol, so that the polymer has the characteristics of polyethylene glycol, the ratio of (1) to (2) being from about 0.5 to about 30 said mixture being at a level of from about 5% to about 60% by weight of said composition said water in said toilet bowl having a pH of from about 6 to about 8.