"Minnesota's Premier Window Cleaners" is a little self-referential and without context. It's probably the most trite thing you can use as a headline, and I think a lot of templates have the headline cornered.
"and exceed those expectations whenever possible." Yeah, that's not a unique selling proposition -- I don't think it's even a firm position. 64% percent of accidents is almost good, but too much of an over reach.
Method "People against dirty" is branding, but gets close to
the personality driven, story based copywriting I advocate. Also, the focus is on people, authentic voice, the human touch.
Also check out
The Car Wash Guys site, nice combination of pictures and text, and the full Claude Hopkins style story.
Otherwise ...aside from the me-me-me ....and "me-too" ....and the non headline ....and there's really not any focus on the employees ....or humans, really ...or a call to action to convert vistors to potential leads.
Nice testimonials though. Good guarantee.