Cleaning compositions in the form of a tablet

A multi-layered cleaning tablet which comprises approximately by weight:

• (a) 25% to 50% of lactic acid;
• (b) 10% to 45% of an alkali metal bicarbonate;
• (c) 0.5% to 15% of bentonite clay containing a blue, green or pink dye;
• (d) 1% to 10% of at least one anionic surfactant;
• (e) 0.5% to 7% of a microcrystalline methyl cellulose;
• (f) 5% to 25% of an alkali metal carbonate;
• (g) 1% to 20% of a bleach containing compound;
• (h) 0.1% to 2.5% of a precipitated silica;
• (i) 0.1% to 3% of a polyethylene glycol having a molecular weight of 300 to 1000;
• (j) 0.3% to 9% of an ethoxylated nonionic surfactant;
• (k) 0.5% to 10% of adipic acid;
• and
• (l) 0.005% to 0.3% of a blue dye or a green dye.