If you suffer from seasonal allergies in Toronto, you already know the drill — itchy eyes, sneezing, congestion from April through October. What most people don't realize: your windows and screens are actively making it worse. Dirty screens act as pollen filters in reverse — trapping allergens and releasing them into your home every time you open a window or a breeze passes through.
Toronto Pollen Calendar
| Month | Tree Pollen | Grass Pollen | Weed/Ragweed | Mould | Optimal Clean |
|---|---|---|---|---|---|
| March | Low | — | — | Low | Too early (freeze risk) |
| April | HIGH | Low | — | Low | Salt removal (not pollen yet) |
| May | HIGH | Rising | — | Rising | ✅ Late May — post tree pollen peak |
| June | Falling | HIGH | Low | Medium | Good if missed May |
| July | Low | Falling | Rising | HIGH | ✅ Early July — post grass peak |
| August | — | Low | HIGH | HIGH | Wait for ragweed to pass |
| September | — | — | HIGH→Low | Medium | ✅ Late Sept — post ragweed |
| October | — | — | Low | Falling | Last chance before winter |
The 3 Allergen Reservoirs on Your Windows
- Screens: Window screens are designed to let air through while blocking insects — but they also trap pollen grains, mould spores, and dust particles in the mesh. A typical window screen in a tree-lined Toronto neighbourhood collects enough pollen in April-May to coat a tissue yellow. When wind blows through the screen, it dislodges pollen and carries it directly into your home. MANTLE removes, cleans, and inspects every screen — included in every window cleaning. Screen cleaning guide →
- Tracks and sills: Window tracks collect pollen, dead insects, mould, and organic debris. This material becomes airborne when windows are opened (the sliding action disturbs settled particles) and when wind enters. Track and sill cleaning eliminates these trapped reservoirs.
- Exterior glass: Pollen film on glass transfers to frames and hands when touched. It also becomes airborne when windows are washed by rain (creating a pollen mist near the window). Clean glass means less pollen available for redistribution.
Allergy Sufferer's Cleaning Schedule
- Clean #1 — Late May: After tree pollen peak (birch, oak, maple). Remove the heaviest pollen deposit of the year. Focus on screens and tracks.
- Clean #2 — Early July: After grass pollen peak. Mid-summer refresh before ragweed season starts. Includes mould check on tracks.
- Clean #3 — Late September: After ragweed peak. Remove the final pollen layer before closing windows for winter. Clean gutters too (leaf mould).
ClearCoat™ = zero chemical residue: Many cleaning products contain fragrances and chemicals that trigger allergic reactions — ammonia, artificial scents, VOCs. ClearCoat™ purified water is chemically neutral: 0 TDS, pH 7.0, no fragrance, no residue. It cleans through pure dissolution. For allergy sufferers, this means: no chemical smell during or after cleaning, no residue on glass or frames, and no trigger risk. Just pure, clean windows.
The $150-$350 allergy investment: Allergy medications cost $200-$600/year. Air purifiers cost $300-$800. Professional window and screen cleaning (3x/year) costs $450-$1,050 total — and addresses one of the most overlooked allergen pathways in your home. Combined with regular HVAC filter changes and air purification, clean windows complete the allergen reduction trifecta.
Breathe Easier. Clean Windows.
ClearCoat™ chemical-free cleaning. Screen removal & cleaning included. Track & sill allergen removal.
Get Allergy-Friendly Quote →Or call (416) 206-3274
Pollen Season Guide · Screen Cleaning · Cleaning Frequency · All Posts