Our Power Powder Bathroom Cleaner is primarily intended for stubborn stains such as limescale and soap residue. To use it properly, you should fill your bottle with 450 ml of warm water to about a finger's breadth above the logo and add the 25 grams of powder. Shake the bottle well and wait 5-10 minutes until the powder has completely dissolved to prevent the nozzles from clogging. You can then spray the power powder onto the dirty areas and wipe with a cloth. If necessary, you can help with a brush or sponge and repeat the application to thoroughly remove all residues. If you're struggling with limescale in the bathroom: The citric acid in our bathroom cleaner kills limescale.