3 Best Pressure Washer Detergents to Banish Grime

The right detergent does more of the work so your pump doesn't have to.

Cleaning & Outdoors Writer

Updated May 30, 2026

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We tested a dozen concentrates on grease, mildew, and ground-in dirt across concrete, vinyl siding, and wood decking.

Our top-rated detergents

detergent jug

GRIME-OFF

Heavy Duty Concentrate

90Overall
Score

$24 at Crate Check Amazon

detergent jug

CLEARCOAT

Siding & Deck Wash

86Overall
Score

$19 at Crate Check Lowes

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