Going to check my brush type, we scrubbed those gutters forever to get them cleaned, used gutter gernade, brush, marxoff pad.
Larry when did you scrub the gutters because most cleaners don't work well even at 60 degrees, and I bought some gutter grenade before and I wasn't satisfied with it one bit at all! as a matter of fact I called and got a refund, they promised me it would work in the 50 degree temps and it did nothing whatsoever while using it diluted, full strength what ever, boy was I mad, I paid 100 some bucks for that chit. Then they tried telling me well it only works on some gutters, lol