I know this has been discussed many times before but after reading post after post, I need to ask a few questions.
Presently, to clean watch parts, I have an inexpensive ultrasonic machine I purchased off ebay. I also purchased 3 small jars with baskets to hold the watch parts. I use L&R Cleaning and Rinse solutions which have come highly recommended. Presently, I put the parts to be cleaned in my #1 jar with cleaning solution and ultrasonically clean for 6 minutes. After that, I transfer the basket with the parts to jar #2 with L&N Rinsing Solution for 6 minutes. Following that, I transfer the basket with the parts to jar #3 with L&N Rinsing Solution for 6 minutes. After completing the 3 cycles, I place the cleaned parts on my L&N parts drier for 3 to 5 minutes or until they are dry and ready for assembly.
My problem is that even though I rotate the rinsing solution jar #3 to position 2 quite often and add fresh rinsing solution to position 3, after cleaning 3 batches of parts or so, my parts are coming out with tiny oily droplets attached to the parts. You can clearly see them on the pillar plates. My thinking is that perhaps I am transferring too much solution going from Jar 1 to jar 2 to jar 3.
I am not familiar with the Ultrasonic Cleaning Machines specifically made for watch parts nor familiar with the process you use to clean parts on those machines. Do you spin off the excess solution after each cycle so as to minimize contamination of the next container? So is it clean, spin, rinse, spin, rinse, spin, dry? Presently I am clean, rinse, rinse, dry and it is not working too well. Should I be drying after each cycle?
Appreciate your thoughts.