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What do you use to remove the stains from bedbugs? Here are some ways to remove bed bug droppings from walls: Spray water on the stain. In the case of walls, it can only crumble. Many commercially available stain removers can help remove stains from wood. A mixture of oxalic acid and water will help remove rust-colored bedbug stains. To cure bed bugs or bloodstains on walls, mix baking soda and water into a paste.
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