Liquid acidic hard surface cleaning composition

1. A process of cleaning a hard surface or an object, comprising the steps of:

a) applying a liquid aqueous acidic hard surface cleaning composition to a hard surface or an object, said acidic hard surface cleaning composition consisting of formic acid, an alkaline material, a nonionic surfactant, wherein the nonionic surfactant is a condensation product of ethylene oxide and/or propylene oxide with alcohols having a straight or branched alkyl chain having 6 to 22 carbon atoms, wherein a degree of alkoxylation is from 1 to 15, optionally one or more dyes, optionally one of more perfumes, wherein the balance of the composition is water, said cleaning composition having a pH of from about 2 to about 2.9 and a viscosity of up to 50 cps at 60 rpm and 20 C;

b) leaving said composition on said hard surface or said object;

c) optionally wiping or providing mechanical agitation to said hard surface or said object; and

d) rinsing said hard surface or said object.

2. A process of cleaning a hard surface or an object, comprising the steps of:

a) immersing a hard surface or an object in a bath of a liquid aqueous acidic hard surface cleaning composition, said acidic hard surface cleaning composition consisting of formic acid, an alkaline material, a nonionic surfactant, wherein the nonionic surfactant is a condensation product of ethylene oxide and/or propylene oxide with alcohols having a straight or branched alkyl chain having 6 to 22 carbon atoms, wherein a degree of alkoxylation is from 1 to 15, optionally one or more dyes, optionally one of more perfumes, wherein the balance of the composition is water, said cleaning composition having a pH of from about 2 to about 2.9 and a viscosity of up to 50 cps at 60 rpm and 20 C;

b) leaving said hard surface or said object in said bath; and

c) rinsing said hard surface or said object.

3. A process according to claim 1 or 2 , wherein said hard surface or said object is located in a bathroom, in a toilet, or in a kitchen.

4. A process according to claim 1 or 2 , wherein limescale is removed from said hard surface or said object.

5. A process of removing limescale from a hard surface or an object, comprising:

removing the limescale from said hard surface or said object by treating said hard surface or said object with a liquid aqueous acidic hard surface cleaning composition consisting of formic acid, an alkaline material, a nonionic surfactant, wherein the nonionic surfactant is a condensation product of ethylene oxide and/or propylene oxide with alcohols having a straight or branched alkyl chain having 6 to 22 carbon atoms, wherein a degree of alkoxylation is from 1 to 15, optionally one or more dyes, optionally one of more perfumes, wherein the balance of the composition is water, said cleaning composition having a pH of from about 2 to about 2.9 and a viscosity of up to 50 cps at 60 rpm and 20 C.