Harpic Powerplus Harpic Powerplus is 5X more powerful than bleach based cocktails and will remove even the toughest stains with just one application. Its unique thick formula gives you better bowl coverage and kills all germs so you can ensure your toilet is left throughly cleaned and disinfected. HOW TO USE 1. To remove cap: tightly squeeze pads on side of cap and unscrew. Replace cap tightly after use. Use undiluted. 2. Directly nozzle under the toilet bowl rim and squeeze bottle gently. Squeeze to apply. Leave for at least 30 minutes or overnight for heavy stains. ALways leave toilet seat in an upright position. Flush clean.