The answer to 'tough stains on house cleaning' is to first identify the type of stain and then use the appropriate cleaning method. Common causes of tough stains include grease, ink, wine, and ground-in dirt. Symptoms may include discoloration, lingering odors, or the stain refusing to come out even after repeated cleaning attempts.
For grease stains, try using a degreasing cleaner or baking soda and water paste. For ink stains, blot with rubbing alcohol or hairspray. For wine stains, blot with a cloth and use a solution of warm water and dish soap. For ground-in dirt, use a stiff-bristled brush and a cleaning solution designed for heavy-duty cleaning. If a stain persists after several DIY attempts, it's best to call in a professional house cleaning service to ensure it is removed safely and effectively.