Spring Window Cleaning & Care: Restore Clarity and Spot Problems

Why spring is the best time for window care

Winter leaves a film of road salt, mineral deposits, pollen, and grime on glass and frames. Beyond aesthetics, dirty windows block up to 40% of available natural light, making rooms feel darker and increasing electricity use. More importantly, spring cleaning gives you a close look at every window — you'll spot cracked glazing putty, failed seals (the telltale fog between double-pane glass), deteriorated weatherstripping, and wood rot that winter concealed under frost and condensation. Catching these issues now means you can fix them in mild weather rather than scrambling when summer heat or next winter's cold arrives.

Tools and supplies you need

• Squeegee (10–14 inch) — the single most important tool. A good brass-channel squeegee with a sharp rubber blade ($15–$25) beats paper towels and newspaper every time.
• Scrubber or strip washer — a T-bar applicator with a microfiber sleeve ($10–$15) for applying the cleaning solution evenly.
• Cleaning solution — 1 teaspoon dish soap in 2 gallons of water. Skip vinegar on sunny days (it evaporates too fast and streaks). For hard water stains, add 1 cup white vinegar per gallon.
• Lint-free cloths — for detailing edges and wiping sills. Microfiber or surgical towels work best.
• Extension pole ($20–$40) — for second-story windows without a ladder.
• Razor scraper — for paint spots, sticker residue, and hard mineral deposits on glass only (never on tinted or coated glass).

Streak-free cleaning technique

• Clean on a cloudy day or when windows are in shade — direct sun dries solution before you can squeegee it, leaving streaks
• Scrub the glass with the soapy applicator, working in overlapping horizontal passes
• Starting at the top corner, pull the squeegee across in a single horizontal stroke, then wipe the blade with a clean cloth
• Overlap each stroke by about 1 inch to avoid leaving lines
• Detail the edges with a dry lint-free cloth — this is where most streaks hide
• Clean frames and sills after the glass — soapy water dripping onto clean glass is frustrating
• Vacuum the window tracks with a crevice tool, then wipe with a damp cloth. Clogged tracks prevent proper drainage and cause water damage to the sill.

Inspection checklist while you clean

• Seal integrity — Fog, condensation, or water spots between double-pane glass means the seal has failed. The insulating gas has escaped, and the window's energy efficiency is reduced by 30–50%. Replacement of the insulated glass unit (IGU) costs $150–$400 per window.
• Weatherstripping — Press a piece of paper against the closed window and try to pull it out. If it slides freely, the weatherstripping is compressed or missing. Replacement kits cost $5–$15 per window.
• Glazing putty — Cracked, missing, or crumbling putty on older single-pane windows lets air and water in. Re-glazing a window costs $50–$100 DIY or $100–$200 professionally per window.
• Wood rot — Probe the bottom rail and sill corners with an awl. Soft spots deeper than ⅛ inch mean rot. Small areas can be patched with epoxy wood filler ($15–$25); extensive rot requires sash or frame replacement.
• Caulking — Check exterior caulk where the frame meets the siding. Gaps or peeling caulk let water behind the wall. A tube of exterior caulk ($5–$8) and 30 minutes can prevent hundreds in water damage.

When to call a professional

Call a house cleaner for basic interior and exterior window washing — expect $4–$8 per window for standard sizes, $8–$15 for oversized or hard-to-reach windows. Professional crews have extension poles, water-fed systems, and insurance for working at height. Call a handyman for weatherstripping replacement, re-caulking, and simple hardware repairs like broken sash locks or stuck balances ($50–$100 per window). Call a carpenter for wood rot repair, sash replacement, or frame reconstruction — costs range from $200 per window for sash-only repair to $800+ for full frame replacement, but catching rot early saves thousands compared to letting water damage spread to framing and insulation.