The Ultrasonic Cleaner did work for me on 3 cycles.
It does take a while to get all the water out of an unmodded one...several puffs got it going for me again when I was too impatient to let it air dry.
Having said all that...I now put the Vortex on a battery, carefully remove both sleeves, remove the filler band, and give it 2 or three wraps with teflon plumbers tape (used in water and gas lines...oderless/tasteless/non-toxic) starting just below the wicks, if it's going to be a really thick juice I might pull the inner tube up slightly so there is a little more room for the wicks to work...then put it all back together. Next I trim the excess tape that sticks out of the bottom of the carto. Fill it and vape...once juice touches that teflon tape it'll turn clear. While as far as I know...the tape is not labled as 'food safe' and all that jazz...it is worthy of noting that it is used in private, commerical, industrial, and medical grade plumbing, distilling, lubrication, and breathable gas systems every day.
Without the ALF, I find flavor is better and it goes a few more refills before cleaning is needed.
From there, if you have an ultrasonic cleaner...great
If not...you can usually just run hot water through it.
If it stops vaping well but obviously still burns...you can take it apart, clean, and burn it off (dry burn or use a propane torch to give it a good cooking).