Replace door seal on washer ????? Indesit wm12x

My washer door seal has loads of black mould that i cannot shift and its smells quite bad so i'm having to replace it. Is this something i (or should i say husband) can do or will i have to get someone out to it ?????

It's a job that can be done gy a competent DIYer. But if there is mould on the door rubber there may be a lot more smelly stuff inside your machine.
This is usually caused by mould growth due to not leaving the door open when not in use. so its worthwhile giving the whole of the tub a good clean.. and Leave the door open when not in use.....