Cleaning Interior Windows
Interior windows are one of the few surfaces in a home where the cleaning result is immediately and obviously visible — a streaky or dirty window is impossible to ignore in sunlight. Yet they're among the most frequently skipped surfaces in routine cleaning. A proper interior window clean is straightforward with the right tools and technique.
Tools
- Squeegee: The fastest streak-free method for large panes — a 12" squeegee with a quality rubber blade. A fresh, clean rubber blade is essential; replace annually or when you notice streaking
- Microfibre cloths: For edges, corners, and smaller panes where a squeegee is awkward. Use one damp cloth to clean, one dry cloth to buff
- Window cleaner: Commercial glass cleaner (Windex or equivalent) works well. An alternative: 1 part white vinegar to 1 part water in a spray bottle — equally effective and less likely to leave residue if over-applied
Technique
Start by wiping the window frame and sill — grit from these surfaces falls onto a freshly cleaned pane. Spray the glass lightly (don't over-saturate) and squeegee from top to bottom in overlapping vertical strokes, wiping the blade after each pass. For corners and edges, use a dry microfibre cloth. Natural light reveals streaks — work in diffuse light or on an overcast day to see the surface clearly without glare.
Frequency
Interior window cleaning 2–4 times per year is the standard for Ontario homes. Spring and fall are the natural timing — spring to clear winter's accumulation of condensation residue and grime, fall to let in the low winter light through clean glass.