Welcome! A little over 20 years here.
Yes, of course there is an alternative. Many of us clean using warm or hot water rinses, along with our usual cleaning tools, to clean our pipes and it works very well.
I start a trickle of warm water going at a rate such as it will just fill the chamber to the top, while pouring out through the airway. BTW, I usually remove the stem so that I can clean out the shank mortise. Also, warm water will discolor Vulcanite, alcohol doe not. For acrylic stems, warm water is the option to use, not alcohol.
Anyway, use bristle pipe cleaners to remove as much build up as I can before drizzling water through the pipe for about 30 seconds to a minute. Then I clean again with more bristle pipe cleaners, folding them into wads to clean out the mortise. I may give the pipe another rinse and cleaning if needed, It works well and leaves the pipe tasting fresher to me than alcohol does.
With some pipes you can reassemble immediately, but with most it takes anywhere from 15 minutes to an hour before any swelling has gone away and the pipe can be reassembled. I've been using this method for years with no problems and no loss of fit, and I own some high grade stuff that I wouldn't put at risk..