I have given the medium hybrid quite a few hours on the glass now and have found that it fails (for me anyway) to remove bird strikes (wing and body pattern).
I give strike a good scrub, leave to soak a minute or two, followed by second good scrub, then clean the whole window, but when I go back and check later residue is still there.
Last straw today a good pigeon strike on an upstairs window so I though I will really be extra thorough with scrubbing it, only to come back a bit later and it was still there. Ended up putting my xline brush on the pole to clean it again (single scrub and rinse), shortly after customer came out to tell me it was gone.
Real shame as I like using the supreme but it simply fails to deal with bird strikes.
My observations on the medium hybrid are:
1. The outer bristles need to hold their shape better instead of collapsing into the glass.
2. Alex needs to dispense with the spare jet holes and pack the brush with more and possibly denser inner bristles.