Is it very warm where you are located? Here in the UK I can sometimes forget washing over night, or 24 hours in the machine (front loader) and not get a problem

Is it very warm where you are located? Here in the UK I can sometimes forget washing over night, or 24 hours in the machine (front loader) and not get a problem with smell, any longer and I likely will - and don't worry my wife tells me when it smells off! Never had a problem with mildew in the gasket either - maybe too cold here? Or maybe the weekly hot wash i do keeps the machine clean?