I am doing some small batches of PCBs, like 100 each time, using solder wire with no clean flux core.
I am using this solder wire. The datasheet recommends IPA and water at 60º.
Usually, I clean it with 99% IPA alcohol. I mean only that (no water,) I fill my small ultrasonic cleaner with alcohol, clean 90 seconds, then I use a toothbrush to clean a little, then again another 90 seconds
But now, I got a 3L ultrasonic cleaner. I like it because I can heat whatever is inside, but I dont know how to proceed.
I don't think that using 3L of 99% IPA will be a good idea. It is a waste of money (it is like 10 USD per liter for me), and it is very very volatile. So, I don't think I can keep it for a while in a room.
What do you suggest? Can I mix with some water? AFAIK, IPA will lose cleaning power with water fast.
If I use some distilled water, how much do you think I can use?
Do you think I can use some kind of detergent or something?
I know that there are products for this, but I checked in many places and, are forbidden to ship to Spain, or they are very expensive.