Found this somewhere, possibly at one of the photography subreddits. What do you think as compared to using the cylindrical forced water washing devices of 10 minutes or so?
Expeditious film washing:
After fixing, fill tank with water at the same temp, +/– 5ºC (9ºF).
Invert 5 times.
Drain and refill.
Invert 10 times.
Drain and refill.
Invert 20 times and drain.
I have two A1s, one of which was the one I had as a youth (which was of course CLA'd by Garry's last year and works flawlessly once again). I also came across some functional and not too costly Motor Drives for these cameras last year in a routine attack of GAS. But I was having trouble: after loading 12 (yes, twelve) AA batteries, after a couple shots I noticed the thing would crap out. Stop advancing anything. The manual advance worked, and the Motor Drive's gear groaned at me while doing so, but the motorized advance refused to work. Removing the battery assembly, and remarking negatively about the battery case's family lineage, I noticed two members of the four-battery compartment were misaligned: their ends were sticking up. Hmmm. "Let's see what happens if I tape them down?"
Well, gosh. Wouldn't ya know. Not as dumb as I look. Works perfectly now in every shooting mode. For good measure I taped the bottom battery area, too, making sure to keep the tape strips short so as not to interfere with the tight margins of putting the whole battery pack back in its case. Love these old Canons.