well for every post telling you not to,theres one telling you its ok.
quoted from diyaudio
https://www.diyaudio.com/community/...-record-cleaner-what-frequency-to-use.276858/
What Frequency to Use and more
As a builder of Ultrasonic Cleaners (a former employee of Sonix4, now independent), I may offer a few insights.
It is true, there have been no reports for damage to vinyl records using the mass-market, Chinese 40khz Ultrasonic Cleaners. They do make a good, inexpensive option for cleaning your Record Collection.
The cavitation bubble formed by a 40khz unit is much larger and more powerful than those of a higher frequency (60khz, 80khz, 120khz, 135khz).
When the cavitation bubble implodes, it releases a jet stream and heat. The larger bubble releases a larger amount of power and heat (10,000 degrees kelvin, according to scientific reports, in minuscule amounts).
The 40khz cavitation bubble is too large to penetrate the record groove, but all ultrasonic cleaners rely on the jet stream to dislodge any debris.
The smaller cavitation bubble of a higher frequency cleaner can form inside the groove, next to debris and dislodge it.
Higher frequency Ultrasonic Cleaners generate MORE cavitation bubble than lower frequency units. More bubbles, more implosions, better cleaning coverage.
I frequently get asked which frequency is the best for cleaning vinyl records. I recommend the following:
If you collect albums that are in poor condition, such as mold or water damage, the the lower frequencies (40khz or 60khz) are the better option. (Many collectors buy from flea markets, estate sales, etc).
If your collection is already in good condition (finger prints and dust), then the higher frequencies would better suit the collector (80khz, 135khz).
Cleaning solution is vital. There are many formulas, but I personally recommend TergiKleen (or a formula similar) because it is archival and used by the Library of Congress for recorded materials.
Carefully monitor the heat in the tank, also. Even though the Heater may turn off the heating element, the act of cavitation will continue to release heat, which will cause the solution to go above the cut-off point! Heat will warp and destroy vinyl records.
To address the issue of cost, I say this: It costs me more than 3X for parts alone than what a Chinese Ultrasonic Cleaner costs! In my opinion, they are deliberately undercutting American Manufacturers.
Hope some of this helps.
-Louis
Vibrato, LLC.