A simple and budget-friendly hack using limes can help eliminate stubborn yellow stains from your mattress while leaving it smelling fresh. Due to its high citric acid content, scrubbing lime juice on the stained area can effectively break down the stain. After squeezing lime juice onto the spot, work it in, wipe with hot, soapy water, and allow the mattress to dry before making your bed. Limes can be purchased for as little as 24p, making this an affordable alternative to chemical cleaners. This method helps maintain a fresh and hygienic sleeping environment.