Myth #1: The higher the PSI, the cleaner the house

Busted: Too much pressure can gouge wood grain, etch concrete, and strip paint or sealant.

Best practice: Match PSI to surface hardness:

• Soft surfaces (vinyl, stucco, siding): 500–1,200 PSI + soft-wash detergents
• Medium surfaces (concrete sidewalks, driveways): 2,000–3,000 PSI
• Heavy-duty surfaces (industrial concrete, stone): 3,000+ PSI with surface cleaners

Myth #2: Cold water is just as good as hot water

Busted: Hot water (180–200 °F) breaks down oil, grease, and organic stains far faster.

When to choose hot: Drive-thrus, oil stains, restaurant exteriors, garage floors.
When cold suffices: Fresh mildew, pollen, loose dirt on siding or roofs.

Myth #3: Detergents are optional—pressure alone will do the job

Busted: Surfactants lift and emulsify grime so high-pressure jets can wash it away.

Tip: Use biodegradable cleaners tailored for:

• Algae & mildew (fungicidal soft-wash soap)
• Oil & grease (alkaline degreaser)
• General dirt (neutral-pH cleaner)

Myth #4: Any nozzle will get the job done

Busted: Nozzle angles control spray force and coverage:

• 0° (pinpoint): Ultra-powerful but risky—can cut surface.
• 15°–25°: Ideal for concrete and hard surfaces.
• 40°–65°: Gentle fan spray for siding, decks, delicate trim.

Myth #5: You can DIY your way to professional results

Busted: Improper technique risks injury, property damage, and trapped moisture (leading to rot).

Why pros matter:

1. Experience—adjust PSI, detergents, nozzles on the fly.
2. Equipment quality—soft-wash rigs, surface cleaners, extension wands.
3. Safety protocols—ladder stabilization, proper containment, chemical handling.