Оригинальный сообщение: Denis Mahony ,
I've had this problem more than once. My method is to wash the pcb in water + detergent. Then rinse thoroughly and use a vacuum cleaner (carefully) to draw the residual water from the pcb. I think this has a greater chance of success than using a hairdryer, since it will also extract any particulate matter that may be lurking. Works for me :) D.