How can I effectively remove a stain over poly from my furniture?

To effectively remove a stain on polyurethane furniture, start by gently wiping the stain with a damp cloth. If the stain persists, mix a solution of mild soap and water and gently scrub the stained area. For tougher stains, use a mixture of vinegar and water or a commercial cleaner specifically designed for polyurethane surfaces. Be sure to test any cleaning solution on a small, inconspicuous area first to ensure it does not damage the finish.