I was told I can wash my hose every other day if I use distilled vinegar (3 cups water to one cup vinegar). I pour it through my hose many times. I like to rinse my nasal pillow every day. I have been doing this for over a year with no problems. I hang up my hose every day to dry. I also change the distilled water every other day. No problems.
Hopefully over time you will adjust to the CPAP machine and will see it as your friend. It does take a while to get used to. Now I can't sleep without it. Keep the thought in your mind that it is a way to improve your health and feel less tired during the day. Good luck.