Method Of Cleaning

1 . A method of washing with a machine comprising:

delivering a cleaning composition into a machine from a pressurized source; and

enabling the cleaning composition to foam before the machine is operated.

2 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is up to 400%.

3 . (canceled)

4 . The method as claimed in claim 1 , wherein the cleaning composition has a pH in the range of from 7 to 13.

5 . The method as claimed in claim 1 , wherein the cleaning composition comprises:

up to 80% wt water;

up to 8% wt propellant; and

one or more of the following components:

5-70% wt builder;

0.1-10% wt surfactant;

0.01-5% wt anti-corrosion agent;

0.1-20% wt performance polymer; and

0.1-5% wt enzyme.

6 . The method as claimed in claim 13 , wherein the canister contains a bag which contains the cleaning composition which includes a propellant, and the canister contains a second propellant around the bag.

7 . (canceled)

8 . The method as claimed in claim 1 , wherein the cleaning composition is in the form of a liquid or gel when it enters the machine, and it subsequently foams.

9 . The method as claimed in claim 13 , wherein the cleaning composition undergoes two stages of foaming: one substantially caused by the pressure drop on leaving the canister and the other substantially caused by loss of propellant from within the cleaning composition.

10 . The method as claimed in claim 1 , further comprising pre-cleaning an article to be cleaned in the machine with the cleaning composition.

11 . The method as claimed in claim 10 , wherein a first charge of the cleaning composition is used as a pre-cleaning composition for pre-treating food soils on the article prior to washing in a dishwashing machine, and a second charge of the same cleaning composition is used for a dishwashing cycle of the dishwashing machine.

12 . The method as claimed in claim 10 , wherein the machine is a dishwashing machine having a dishwashing cycle, and the article is a kitchenware article, and wherein a single charge of the cleaning composition is used for pre-treatment and the machine dishwashing cycle, a pre-treated kitchenware article being used to deliver the cleaning composition to the dishwasher, to perform the function of a main wash cleaning composition.

13 . The method of claim 1 , wherein the pressurized source comprises a pressurized aerosol canister.

14 . The method of claim 1 , wherein delivering the cleaning composition into a machine comprises delivering the cleaning composition as a foam.

15 . The method of claim 1 , wherein delivering the cleaning composition into a machine comprises delivering the cleaning composition as a foam precursor.

16 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is up to 200%.

17 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is up to 100%.

18 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is up to 50%.

19 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is up to 30%.

20 . The method as claimed in claim 1 , the chemical composition having an unfoamed condition and a foamed condition, wherein the expansion co-efficient of the foamed cleaning composition to when unfoamed is at least 5%.

21 . The method as claimed in claim 1 , wherein the cleaning composition comprises 0.1 20% wt sulphonated polymer.