After a year the pillows on my D1 Sarena Bay started 'chalking'. I noticed when I would wipe down the tub's water line, some gray 'rubber' would fall off of the pillows into the water. This got worse and worse over the months. I finally peeled them off the wall (six of them) and contacted D1 after my selling dealer didn't respond to my calls.
D1 said to work w/ the dealer

so,,,, I tried again. The dealer said it was my water and since I hadn't had all my water tests done thru them, they couldn't warranty them. D1 pretty much agreed they said. So, $110 later I have six new pillows, feel cheated and want to avoid a repeat. I'm going to mail the old ones to D1 - maybe they can make some improvement and maybe they'll find an issue and realize it wasn't my water as I test it myself at least 2x per week.
Any one else seeing parts deterioration in D1 tubs - pillows, under water switches, etc.????
Thanks,,