You can clean the underside of the deck with a diy cleaning solution, or a pressure washer. Keeping your deck clean is essential. Amazon. com has been visited by 1m+ users in the past month Get deals and low prices on best cleaner for deck at amazon. Learn how to clean under your deck to prevent issues and make the most of your outdoor living space. Here’s how to do it yourself. We hope this information helps you maintain a comfortable and clean deck space. In my region, these raised decks or balcony decks are common, and the un. We offer household cleaning products at great prices. Shop online today! The dark, damp environment under the deck is prone to dust accumulation and mold growth. · so, how do you clean under your deck ? This article will provide a detailed guide on how to clean under your deck. In this video, i show the basic process i use to clean the underside of a deck. · learn why it’s a good idea to clean under your deck and check the structure’s soundness every spring. If you dont clean the underside, mold and mildew can build up and compromise the decks integrity. To prevent the mold, mildew and algae from returning, all you have to do is spray the underside of the deck with an solution two or three times a season and rinse. Chock the rear wheels and lift the front of the mower off the ground with a floor jack, then you can get under there and clean the deck w/o removing it. That deck design is prone to holding a lot of grass, cutting wet is going to aggravate the situation. · cleaning your deck every spring, including the underside, is important to helping it last longer.