I just use Ettore rubber - good all around hot or cold. You will need some washer fluid if you’re going to work below freezing (blue for mild, pink for extreme). I would fill a bucket up with hot water and put soap in it, then get my mop all soapy then wring it out. Then put washer fluid in a squirt bottle (or directly into the boab) and use that as my fluid. Then when your mop gets chunky dip it back in the bucket to defrost.
As for keeping your rubber from freezing… move fast. If you can’t fan fast, then there is no better teacher than subzero. But your hands will freeze before your rubber does.
Nope. I use a regular squeegee, but if it’s a weird window or difficult, I’d use a wagtail. But if you’re going to fan with a pole, use a smaller squeegee (maybe 14").
There is nothing better than microfiber cloths. But if you’re soaking them from sills, get yourself a 6" sill squeegee to get most of the water off.
Yes. All of them. I can’t use widebody channels, but that’s just me. If you want to learn to fan, get yourself an easy window, mop it up and just move the water around with your squeegee. Don’t worry about anything just move it around. Learn how the happy squeegee wants to glide and oh, missed a spot there are no accidents and no worries as long as the squeegee is wet go back and get it and whatever you do don’t lift it off the glass. Ever. It may explode.