I have a MacBook Pro PCB that has lots of yucky, gooey and sticky grime from a spill that thankfully didn't damage the board. I would like to clean the PCB thoroughly, but I fear turning the liquid contact indicators (LCI) red and raising eyebrows at AppleStore in case I take my machine in for paid repairs.
I've read about repair shops using ultrasonic cleaning using water mixed with Branson Ultrasonic Cleaning Solution to clean PCBs, but it is unclear whether it sets off the LCIs. Does it set them off?
I'm considering using a soft brush and denatured alcohol, which is around 90% ethyl with some methyl additives according to MSDS. Do I need to be extra careful to avoid having alcohol contact the LCIs?