Why not give the Unger liquid a try? I have been using that for a while now and been surprised by how good it is.
Imperative you don't use too much though.
A snub nose pliers is best for dog earing, you can grip just the right amount to bend.
I don't have the unger BOAB, well I do but don't use it, I prefer the one that is made by another manufacturer (forgotten the name of them though!) This one is blue and not green and I have no problems with the squeegee rubber getting damaged.
Perhaps I have mis-read the reply the one guy (forgot his name
) but if you are using a squeegee why on earth would you want to polish a window after you have cleaned it
I can understand a bit of detailing and the odd 'kick' that needs to be buffed up, but certainly not every pane.
I have found that squeegee rubbers can last me weeks per side, though it only takes one tatty window to ruin a side of your rubber.
Also: I too use the channels with the serrated edges for the prongs on the handles to grip, but I still put in the end grips to hold the rubber in place. Prefer the old brass ones though, not a fan of those cheap plastic things that Unger now do.