Window Washing Guide
MASTHEAD / JAN DAVENPORT
EDITORIAL TEAM

Jan Davenport

BASED IN
United States
EXPERIENCE
Giordano Inc. editorial team
BEATS
MIDWEST RESIDENTIAL ROUTESGREAT LAKES WATER CHEMISTRYPRACTICAL FIELDWORK COVERAGEPRICING AND SMALL-BUSINESS OPERATIONS
THE LINE THEY KEEP REPEATING

"The job nobody includes in the estimate is the job that costs you the customer."

— A standing editorial principle for pricing and small-business coverage on this site.

ABOUT JAN

Jan Davenport is part of the Giordano Inc. editorial team and covers the Midwest and Great Lakes editorial beat for Window Washing Guide. The articles and state pages under this byline address regional water chemistry across the Lake Michigan corridor, practical fieldwork topics (solvents, screens, frame conditions, pressure-washing aftermath), pricing of residential and small-commercial routes, and the seasonal patterns that define window-washing work across the upper Midwest and Great Lakes states.

The operational and pricing details in these pieces are drawn from a combination of practitioner interviews, published trade references, small-business operations literature, and municipal water-quality reports for the relevant supply districts. Where a specific protocol or pricing observation appears, it has been reviewed against multiple sources rather than reported from a single operator's experience.

Window Washing Guide is published by Giordano Inc., and the full editorial team — including Derek and JoAnn Giordano — reviews coverage in this beat before publication. Reader correspondence on Midwest and Great Lakes topics is welcome through the site contact form.

§ ARTICLES BY JAN
8 PIECES
DIAGNOSTICIAN
Cloudy shower glass that won't come clean
JUL 15, 2026 · 11 MIN READ
ENCYCLOPEDIA
Pure water systems: RO/DI for residential and small-commercial window-cleaning routes
MAY 12, 2026 · 15 MIN READ
PRO TRACK
Working at height: a cleaner's safety primer
MAY 10, 2026 · 14 MIN READ
PRO TRACK
Pricing your first commercial route: a working framework that won't bankrupt you
MAY 9, 2026 · 13 MIN READ
DIAGNOSTICIAN
Cloudy windows after pressure washing: capillary intrusion and the sin of detergent runoff
MAY 8, 2026 · 11 MIN READ
DIAGNOSTICIAN
Sap, tar, and bug residue: the solvent ladder for the things you can't just wipe off
MAY 6, 2026 · 11 MIN READ
DIAGNOSTICIAN
Black mold around your windows: frame vs. glass, and the diagnosis homeowners get wrong
APR 30, 2026 · 11 MIN READ
DIAGNOSTICIAN
White spots on your windows after it rains? Here's what's actually happening.
APR 12, 2026 · 11 MIN READ
§ BLOG POSTS BY JAN
2 POSTS
SEASONAL
May is the worst month to wash your windows. Three things to do anyway.
MAY 10, 2026 · 7 MIN READ
HOW-TO
Window screens: the part of the job nobody includes in the estimate.
APR 30, 2026 · 7 MIN READ
§ STATE PAGES BY JAN
9 STATES
STATE PAGE
Window cleaning in Michigan: GLWA water, six months of salt, and the route I bought from a guy retiring in 2015
MAY 10, 2026 · 19 MIN READ
STATE PAGE
Window cleaning in Ohio: three states in one, from a Detroit cleaner who has worked a few routes across the line
MAY 10, 2026 · 18 MIN READ
STATE PAGE
Window Washing in Iowa: A Corn Belt Operator's Field Guide
MAY 11, 2026 · 17 MIN
STATE PAGE
Window Washing in Kansas: A Wheat-Belt Operator's Field Guide
MAY 11, 2026 · 17 MIN
STATE PAGE
Window Washing in Missouri: An Operator's Field Guide to a Four-Zone State
MAY 11, 2026 · 18 MIN
STATE PAGE
Window Washing in Nebraska: A Four-Zone Operator's Field Notes
MAY 11, 2026 · 16 MIN
STATE PAGE
Window Washing in North Dakota: A Three-Zone Operator's Field Notes
MAY 11, 2026 · 15 MIN
STATE PAGE
Window Washing in Oklahoma: A Three-Zone Operator's Field Notes
MAY 11, 2026 · 16 MIN
STATE PAGE
Window Washing in South Dakota: A Four-Zone Operator's Field Notes
MAY 11, 2026 · 16 MIN
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