The cleaner can also be used on fences, roofs, decking and more, and boasts over 27,000 reviews
Phoebe Barton Affiliates Content Editor and Rahaf Ali
14:07, 10 Feb 2026Updated 14:07, 10 Feb 2026
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Wet and Forget Multi-Surface Outdoor Cleaner requires no scrubbing(Image: Amazon)
As spring draws nearer and we begin to spend more time in our gardens, the green algae and mould left by winter become increasingly noticeable. This season is ideal for having a dependable outdoor cleaning product at one’s disposal.
For those wanting to revitalise their outdoor areas without investing hours of elbow grease, there’s one product that comes highly recommended by shoppers. The outdoor patio cleaner Wet and Forget Mould, Lichen and Algae Remover is a bleach-free formula that customers hail as ‘one of the best outdoor cleaners ever’.
What distinguishes Wet and Forget is its effortless application, with no scrubbing whatsoever needed. This makes it a handy quick solution for sprucing up outdoor areas.
Simply mix one part Wet and Forget with five parts water, apply it to the surface, and leave it to work. There’s no need for rinsing or pressure washing, reports Wales Online.
What’s more, it’s currently on offer on Amazon, reduced from £35.99 to £26.68 for 5 litres, with the 2 litre version now £14.99, down from £21.99. Given how far the diluted solution stretches and the variety of surfaces it can tackle, customers report it represents exceptional value for money, particularly when compared to hiring equipment or replacing stained outdoor areas.
Wet and Forget Mould, Lichen and Algae Remover
£35.99
£26.68
Amazon
Buy here
Shoppers can get the multi-purpose cleaner for less.
Other popular options for tackling mould and algae include the Rapid Mould and Algae Remover Spray from Lakeland, priced at £49.99 for a 2 litre bottle that can cover up to 200m2. B&Q also offers the SCRUBB Exterior Liquid concentrate Algae and mould remover, another reliable patio cleaner currently discounted from £19 to £13 for a 5L bottle.
Returning to Wet and Forget, this extremely popular algae and mould remover has accumulated over 27,000 reviews. Customers are consistently commending how effective and swift the results are when using the patio cleaner. Its versatility is another selling point.
Amazon shoppers have reported successful use on patios, fences, driveways, walls and house exteriors. One customer encapsulated their experience, stating: “Wet and Forget is honestly one of the best outdoor cleaners I’ve ever used. I applied it to my patio, fencing, and the side of the house where mould and green algae always build up.”
Another wrote: “This product is the best on the market and worth the cost. My fences have looked great for years with a treatment every 5 to 7 years or so. Plus unlike high pressure cleaning, it doesn’t remove the pine wood treatment meaning it is clean but not exposed to termite damage.”
However, the patio cleaner didn’t impress everyone. One reviewer remarked: “Did not find this sufficiently effective on removing algae from Indian stone flags.”
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