Wet & Forget Outdoor Moss Mold Mildew & Algae Cleaner - Hose Refill

Our review finds the Wet & Forget Xtreme Reach Hose End Refill is built for homeowners who want a low-effort solution to moss, mold, mildew, and algae on multi-level exteriors. The biggest reason to buy is its hose-end application that eliminates scrubbing and pressure washing; simply attach the original nozzle, spray, and let wind and rain do the work. The product is strongest where reach and convenience matter, treating up to 2,000 square feet per bottle and allowing surfaces to remain cleaner for up to a year.

Key Features

• Hose-end nozzle: Attaches to a garden hose and uses a jet tip to spray up to 30 ft for second-story siding and roofs, reducing the need for ladders or rental equipment.
• Two spray options: Jet tip for long reach and fan tip for rapid coverage on driveways, patios and decks, so large surfaces can be treated quickly.
• No scrubbing required: The formula cleans over time with natural weather, meaning homeowners do not need to scrub, rinse, or pressure wash after application.
• Gentle chemistry: Bleach free and non-acidic, making it suitable for many exterior surfaces while being less harsh than bleach-based products.
• Long-term results: Green stains typically clear in 1-2 weeks while heavier black stains may take several months, and treated surfaces can stay clean up to a year or longer.
• Coverage per bottle: One 48 fl oz refill treats up to 2,000 sq ft, offering predictable planning for medium-sized exterior jobs.

Who It's For

The product is ideal for homeowners with multi-story siding, roofs, and hardscapes who prefer a low-effort routine and want to avoid ladders or pressure washers. Those who value a gentle, bleach-free cleaner and who can wait days to months for visual improvement will appreciate the hands-off approach.

It is less suited to users seeking immediate, dramatic results or who must remove heavy black stains overnight; long-established or deeply set stains can take 6-12 months to fully dissipate. Also, properties next to sensitive water bodies require careful spacing and plant flushing before and after use.

Pros & Cons

Pros

• Easy hose-end application that reduces manual labor and eliminates scrubbing.
• Jet and fan tips cover both high-reach and large horizontal surfaces efficiently.
• Bleach free, non-acidic formula that is gentler on many exterior materials.
• Good coverage per bottle for routine maintenance of medium-sized homes.

Cons

• Spray reach and sprayability receive mixed feedback; not every user reaches the full 30 ft in practice.
• Slow visible results on heavy or long-established stains, sometimes requiring months.

Specifications

Product type	Outdoor moss, mold, mildew & algae cleaner
Format	Xtreme Reach hose end refill with original nozzle
Volume	48 fl oz
Coverage	Up to 2,000 sq ft per bottle
Chemistry	Bleach free, non-acidic
Recommended temp	Apply above 55 F; spray dry surface on cool day
Rinse requirement	Do not rinse; allow wind and rain to clean over time

Our Verdict

The Wet & Forget Xtreme Reach Hose End Refill is a strong choice for homeowners seeking a low-effort, long-term maintenance cleaner for siding, roofs, patios and decks. Its hose attachment and dual spray tips deliver practical convenience and good coverage, and the bleach-free formula protects surfaces. Buyers who need fast, instant removal of severe stains should consider alternatives, but for routine upkeep and ease of use this refill provides good value.

Frequently Asked Questions

How long until I see results?
Green stains usually improve in 1-2 weeks, while heavy black or long-established stains can take several months or even 6-12 months.

Do I need to rinse after applying?
No rinsing is recommended; the product cleans over time with wind and rain, though avoid applying if rain is forecasted within 4-5 hours.

Can I use it near water features?
Spray at least 100 ft away from lakes, ponds, rivers and streams and flush plants with water before and after application for safety.