I gave your post a highly coveted 'Winner Award'. It's generally excellent advice. I have a long experience from my lab science days of handling biochemicals that are not very soluble in water, and using detergents to help with that. Naturally, of course, I also have a few questions
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Excellent advice. That's why I gave you the Winner. You seem to get how to use one of these ultrasonic bath cleaners, something that many people, including some lab scientists I've known don't get.
Good idea. You seem to understand how easy it is to overload these ultrasonic generators. Heating it to 35°C probably may help just a little. Detergents work well at room temperature too.
All these points are excellent. Thanks for posting this.
Now, my questions:
Why distilled water? Is deionized water cheaper or more available? Either will work. For what it's worth, so will cold tap water. For cleaning finger print residue off of vinyl records, plain tap water with a few drops of detergent will do the job.
Why use the isopropyl alcohol (aka isopropanol)? Most detergents I've known are easily dissolved in water, without the addition of any alcohol, ethanol, methanol, or isopropanol.
I looked up Turgikleen. It's a mixture of 2 different detergents. Apparently one of them needs the alcohol just to dissolve in water. Why bother? There is a long list of non-ionic detergents (no + or – charges on the molecule). I won't list them all, but Triton X-100 (TX-100) is probably the most common. They all work at cleaning finger print residue off of vinyl records.
Common liquid dish washing detergent, meant for hand washing dishes, will also do the job. Use only a very few drops in tap water.
Avoid using the more common ionic detergents (molecules with a + or – charge) such as sodium lauryl sulfate, aka sodium dodecyl sulfate. These also works, but may require extra rinsing.