I see others had the same issue in the past. Has anyone not been able to delete the cleaning fee? I have tried different devices and internet servers/pages or whatever they are called and no luck. I have also tried putting '£0' but it has to be at least £4 and no option to delete.
it is a bug. Once a cleaning fee is set, the field does not accept 0 (zero) or leaving the field empty to remove the cleaning fee. You can report it via Airbnb Feedback