If you have unsealed grout in your bathroom, it’s time to clean it. Grout is a water-based adhesive that holds tiles and other flooring together, so it needs to be cleaned regularly to keep it looking its best. To cleanse the grout, start by pouring a pot of water onto the floor and then using a plunger to suction onto the top of the grout and pull. The water will start to flow through the grout and into the sink. Once all of the water has been used up, use a cloth or paper towel to dry off the grout and tile.