I don't know much about brifters, but I now have a set of Shimano 105 5500 Flight Decks.
(Interestingly, I'm gathering the group before even having a frame to put it on!)

I read about flushing with WD-40, and then using Tri-Flow, but don't know exactly how to do it.
Squirt while advancing and retracting, I assume, and spray all around the mechanicals?
Leave the hoods on? Best to let the shifters dry for several days before Tri-Flow?

Sorry if this is kind of a "Captain Obvious" post, but I want to prep these brifters the best I can, for longevity and reliability.

Thanks in advance!