When I got home, I started with ten drops. To put it mildly, ten drops isn't a whole heck of a lot.
Normally, I go by the half vile to full vile methodology for Mega Steam. However, since this unit is going back no matter what, I wanted to be a little by the book....for now.
And to John and Hancock's points, doing it slowly...and cold...does indeed matter.
Thanks for helping me out, John. That's twice in only a few weeks.
Thanks to all for responding.