ultrasonic

Brachus has a great recapping video for classic mac analog boards which he cleans in his ultrasonic cleaner after removing the speaker . But I cant find reference as to how he drys them . Just air or a hair dryer ? Any suggestions greatly appreciated !

Apart from removing the speaker is there anything else that should be removed before I give the Classic II A/B a bath?

For those who are using ultrasonic cleaners for boards (and other computer related components, if applicable): What sort of cleaning solutions are you using, if any? There seem to be quite a few that seem suitable for use on electronics. Bonus points if they're available in the US :-) Also, any...