I have soft moulds and a year or two is about right for the length of time they last. When I was a kid and had hard moulds they lasted a lot longer.
Also, tubing is easy to replace yourself, no need to go to an audi. Just pull the old one out, putting the ear mould in hot water helps to loosen it. Then push the new tubing in and match the length to that of the old one. Then just cut it off, best to cut it a bit long at first to leave room for adjustment. It's that simple and only takes me a few minutes to do both moulds.
