Hi @Alastair C,

Welcome to the Dyson Community!

Ordinarily you should be able to initiate your Dyson WashG1 wet cleaner’s self-clean cycle following the steps in our video guide:

If it doesn’t seem to be working for you, are you able to provide any other details about what’s happening when you try to start self-cleaning - are there any errors or alerts shown on the LCD display, for example?

For support in resolving this under your Dyson warranty, you'll need to talk directly to our Dyson Customer Care experts in your region. You can find the contact information for the Dyson Australia team here.