My waste has started to smell?

Is my waste is turning anaerobic?

If your compost is starting to smell sour or putrid, or you have excessive amounts of leachate leaking from the HOTBIN base, your compost may be turning anaerobic. 

This needs to be corrected quickly by getting the HOTBIN up to the correct temperature and working aerobically. Please follow the how to get to 60°c check list and waste too wet for hot composting to resolve this.