Even with regular cleaning, the silicone tips and tubing on your hearing aid will not last forever.
Eventually, the tip will lose its shape or discolor over time, and the tubing will stiffen and possibly get bent out of shape—both of which could decrease the quality of sound reaching your ear.
As this process happens slowly, much like hearing loss, you might not realize the sound quality from your hearing aid is slowly getting worse. That’s why even with regular cleaning, I suggest replacing the tubing and tips every 3 to 6 months. I’ve had countless customers who thought their hearing aids were broken, only to put a new tubing and tip on their hearing aid and have it sound like they day they bought it!