Hello, after seeing various window cleaners using 35cm brushes are there everyday brush, does anyone here that uses them all the time have a particular favourite(s)? I like the look of the Xtreme standard medium and the Xtreme flocked sill, but wondering if an ultimate might have a bit more cleaning power (although is a bit heavier). I use 26cm mostly but hoping a 35cm will speed me up. Thank you.