Editing How to Clean a Motherboard (section)

==Precautions==
===Glossy vs. matte finish boards===
Boards that appear to have a “glossy” finish are more delicate & fragile than boards that appear to have a “matte” finish. Boards that are glossy must be ultrasonically cleaned more carefully - '''for these boards, only ultrasonic them for 1 minute per side'''. Affected Apple models include A1989, A1990, .{PAUL PLEASE PUT OTHER MODELS I LEFT OUT HERE}

===Risk of board death from ultrasonic cleaning=== 
A working board can be killed by an ultrasonic cleaner. The motherboard is the most expensive part of the machine, and on modern machines often has the data integrated onto it. We must seek to prevent "death by cleaning" as often as possible. Common causes of death are:
*Cleaning at too high a temperature.
*Cleaning the board for too long.
*Leaving the board to soak in the cleaner and walking away - Then forgetting the board is still in the ultrasonic cleaner.
*Powering the board ON before it is fully dry.
*Using inappropriate cleaning materials that are too rough or too harsh on the board.

Soaking for an excessive period of time is a ''very'' common reason for board death - which is why we have the rule '''"Never return to your desk until the board is done being cleaned!"''' Put a game on your phone or something to make sitting next to the ultrasonic for a few minutes more tolerable.