I wasn't concerned with cleaning any of my attys until one of my first 'died'. I tried the atty resurrection process, sorta worked, the atty came back but was no where near the production that it once had. I tried the rinse in pga, rinse with hot water, neither brought that atty back to useable. Recently used that isoproyl alcohol bath on it.....works like new!!! This was an atty I had used almost exclusively for a month and it worked great until it just stopped. I have bought other attys and have 10 or so around and would say that to clean them it would make more sense to just vape plain pg/vg through them. I would agree with the OP that attys probably are not meant to be left completely dry so I try to keep my in sealed bags with some pg in them. I know that when smoking my zippo lighter wicked much better if kept with liquid in it then if I let it dry out. I have noticed that in some attys you can see the ends of the wick and it turns brown after a week or so of vaping, after the alcohol bath it is mostly back to a white color. I don't 'clean' my attys on a regular basis, only if they stop producing.
As a side note: if you don't let the alcohol completely evaporate from your atty either through drying overnight or using compressed air or fan or hair dryer, you risk your health. Isopropyl alcohol is oxidized by the liver into acetone by alcohol dehydrogenase. Symptoms of isopropyl alcohol poisoning include flushing, headache, dizziness, CNS depression, nausea, vomiting, anesthesia, and coma. Use in well-ventilated areas and use protective gloves while using. Poisoning can occur from ingestion, inhalation, or absorption.
Just my 2 cents!
KayleePup