Gardening expert Fiona recommends using a garden hose rather than a pressure washer to clean the desk if you really don't want to risk causing any damage. Citra-Shield—a product designed specifically to kill algae—also failed to make the cut. I filled a pump-sprayer with the product (no diluting) and took it to a tiny rural cemetery where I knew the headstones had plenty of algae growth. I saturated two headstones with the cleaner and then went home to give Citra-Shield the required time to work. Gently scrub the affected area, working the cleaning solution into the surface to lift away the mould and mildew. Then, per the manufacturer’s directions, I wet down one end of the painted board with water and poured on a small amount of Star brite—full strength. After letting the solution sit for a few minutes to soften the stains, I wiped the board with a soft rag, and the mud and grease came right off. To complete the test, I rinsed the board with water to remove any errant cleaner, and once it was completely dry, I inspected the paint. It looked great—as intact as the other end of the board that I hadn’t cleaned.

For a gentler clean to remove surface dirt and cobwebs, you can use a solution of washing up liquid in warm water. Be careful not to over scrub with anything harshly abrasive, and avoid rubbing against the grain, as that can leave marks.

Warm water and dish soap should be all you need to clean away most dirt and spills. It is a highly effective cleaner, very cost-effective, and exists in most people’s homes. Clean up any food or liquid spills with a paper towel and if that does not work, use the handy soap and water technique to remove any food debris. Even if you have grease stains from food debris, warm soapy water should be all you need. Environmentally friendly compared to many alternatives, though plastic sheets may be necessary to shield sensitive plants.

Mould Growth: Break up the mouldy patches with a soft brush and then wash them away with warm, soapy water. Regular cleaning is the best way to prevent regrowth. The wood fibres, plastics and bonding agents are mixed and heated to be made into board length shapes. The boards are further pressed with a wood grain onto the surface and then cooled. When using a recommended cleaner, follow the manufacturer’s instructions for dilution ratios and application methods to achieve the best results.Sprinkle baking soda on the mildew or mold with the vinegar solution and let sit for 20 minutes. This will allow the solution to break up the mildew or mold, making it easier to remove. I diluted Mold Armor and filled a trigger-type spray bottle. Like another mold cleaner I’d tested, I had to visit a neighbor’s house to find mold to treat. I sprayed on the product as directed, waited 10 minutes, and then rinsed it off, but there was no improvement. I repeated the spraying, and the second time I brushed the area while it was wet before rinsing. Still, traces of mold remained.

This is one of the first eco-friendly cleaners I’ve used that lives up to its claims. The only downside? I wasn’t too fond of the smell. It’s not heavy or overbearing; I just didn’t care for it. Need to be careful when applying as you can fade your boards (only temporary until stain applied though)Krud Kutter comes in a 1-gallon jug and makes 11 gallons of cleaning solution when diluted, which is enough to clean up to 2,000 square feet. That’s a lot of cleaning power for the price. Don’t want to put in a lot of elbow grease? Consider Wet & Forget Outdoor Cleaner Concentrate. A liquid concentrate that dilutes with water, it doesn’t require any scrubbing, mopping, or even rinsing. It dilutes at a 1:5 (cleaner to water) ratio, is safe for use on walkways and most types of siding, and the 1-gallon jug will treat up to 2,250 square feet. After cleaning the test board, I tried out the cleaner on a sidewalk and a courtyard wall where a Boston ivy had left tannin stains. Simple Green cleaned them both, and I didn’t have to worry about overspray hurting my ornamental plants or the lawn. Go over the surface again with any remaining solution and immediately rinse off thesolution using a garden hosepipe, ensuring all the solution is removed.

Floor scrub brush 2 in 1 scrape&brush push broom ergonomic principle: the angle of the pole and brush part conforms to the ergonomic principle, which can be used to use the broom/brush with less effort, so that cleaning can be simple and convenient. While the cleaner is designed to be used with a pressure washer, it can also be diluted and applied manually with a brush. The Environmental Protection Agency (EPA) has recognized Simple Green as a "Safer Choice," meaning it is more eco-friendly than many competing products. After diluting with water, this 1-gallon cleaner makes up to 20 gallons, which is enough to clean up to 5,000 square feet. With an impressively low price, Zep gives you plenty of cleaning power for your money. According to the manufacturer, using this formula with pressure washing equipment will deliver the best results. It’s worth noting that Zep is not meant to revive deteriorating surfaces. Therefore, it should not be used on old wood or paint unless you intend to refinish it. Do not mix ammonia-based ingredients with bleach. Some products can be safely combined, but don’t mix a product that contains ammonia with a bleach solution. Combining these two ingredients creates toxic chloramine gas that can cause eye, nose, mouth, and respiratory irritation.Price–Expensive products don’t necessarily work as well as you think they will. There are cheaper options available that can also do the job well. General Scratches: Scuffs and imperfections are a result of normal use, and can be left alone to naturally fade away over time. When connected to a garden hose, an outdoor cleaning wand with an integrated scrub brush will easily spray away loose dirt and debris. While testing each cleaner, I used a rubric to score its performance. Several aspects were scored, including how easy it was to understand the application instructions and whether the cleaner lived up to the manufacturers’ claims.