I had a Heart transplant and I was taught as for cleaning that once a week I use 1 part vinegar 4 parts water and soak my hose and tank once a week. I use a full mask and wipe out the mask with a baby wipe every day. I've used it now for over 12 years and had the transplant 6 years ago. I see it this way the basic function of the device is Appling pressure to your mouth so really the only germs that leave us don't go past the mask. I always use distilled water in the tank to keep it cleaner. I have not had any lung issues with my cpap. I keep my humidity at level 5 so that also keeps the humidity pretty high but my tank can almost handle 2 nights of about 8 hours each. I hope that helps. I know the book says a mild soap but the technician who did my sleep study does it that way on his own cpap. Vinegar being a more natural cleaner and without residue like soap could leave on the items.
I also replace my tank, hose, mask and filters according to what the Insurance company allows. Which is a mask every 2 weeks, it has 2 filters one is washable and the other i replace every 2 weeks. Hose is every 6 months along with a tank. The only exception was I replace the mask a bit early once when I had covid.
So thats what works for me
Blessings

No, they didn’t give us a protocol. I told them I would try alcohol and rinse.
DH swore he could still taste it, same with vinegar and rinse. I went back to mild soap and rinse. We had no issues.