Just my own personal input here:

Until about a month ago, I didn't use a humidifier at all despite the often very dry conditions here in SoCal. But i started to get too much throat irritation and related issues so I finally started to use a passive, passover humidifier. I don't experience rain-out at all, really. But then, its not much of a humidifier.

Also, I don't rinse my hose out at all. Yikes! I wash my mask often but since all I get through the hose is air from my BiPap, I generally leave it alone.

However, one thing I do have is a hose that has ridges on the outside but is smooth on the inside. For over two years, I used the cheapie, translucent blue ribbed hose that the insurance company left with me - the kind that whistles when you whip it in circles. Not sure if you use that sort of hose but I am thinking that might be more prone to trap water in the ridges and not dry out so well. If you do have that kind of hose, I highly recommend buying the higher grade hoses that are actually spiral ringed hoses that are smoother on the inside - they are more flexible and maybe they might dry out easier because they are less prone to trap water. They aren't completely smooth on the inside but have less "depth" on the ridges than the ones that are molded to have ridges.

If you already have the spiral bound hoses that are smoother on the interior, maybe hanging them vertically and near a source of warmer, rising air might help - I only say this because I wouldn't want your other CPap to prematurely reach that unknown number of hours on the fan before it craps out. Also, I would be careful about hanging the hoses or keeping them in directly sunlight - not sure what UV will do to them.

Sorry i can't be of more help - it seems the Bay Area and any area near the ocean might have a significantly higher amount of relative humidity on a daily basis. I am 30 miles inland and the most I feel of the ocean on a typical day is the marine layer that creeps in until about noon during June gloom. Although, I do recall during one freakish, rogue spell of pretty bad humidity a year or two back (in dead of summer when the moonson-ish type stuff from south of the border spun into SoCal for awhile). I think I did have "rain-out" because at the time, I thought I had tipped the humidifier over and water had spilled into my hose.

Good luck!
MC

I had an idea..while thinking about this...issue

how about using a hair dryer to dry out our hoses..periodically..

that should work

I do not rinse it often..every few weeks... suppose I should get better

but when I do..I put really hot water thru the hose..

As you have stated, you probably need to cut back the setting on the humidifier.

If you are worried about mould, then clean them I use half a cap max of bleach in a bucket of water about once a week, sort of {:-).

When I clean my hose, I give it a rinse with mouthwash on the theory that it will kill any microbes that are fixing to take up residence there. In the morning, I stop the humidifier (which I only use in dry season here) and let the thing blow for a good spell to help dry it out.