Kleen Out _best_ -

"To open the container, you will need a the Kleen Out bottle cap (often a slotted tool or key) to pierce the seal safely."

: While available at retailers like Walmart, it is considered a professional-grade tool for plumbers and facility managers. kleen out

The flagship product under this name is a concentrated sulfuric acid solution. Unlike standard enzyme or bleach-based cleaners, it uses a chemical reaction to liquefy contaminants on contact. "To open the container, you will need a