\u00a9 2023 wikiHow, Inc. All rights reserved. Clamp into place. Clean the surfaces thoroughly with a clean cloth moistened with rubbing alcohol. Place the board over the sink, then run a bar clamp through the drain, securing one end of the clamp to the 2x4 and the other end against the drain. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Use a soft cloth or a damp towel to wipe the area clean. This prevents air, water, dust, or other materials from infiltrating seals and keeps things tight. This sink was attached with clips. After turning the knob, test the faucet to ensure the water supply is properly shut off. Stain Solver is a certified organic powder made in the USA with USA ingredients. Avoid using ammonia-based cleaners, since this creates toxic fumes when combined with bleach, which you'll be using next. It'll be squeaky but it'll come off.