We heard your concerns, and that's why we want to re-address this topic again. Below are two proper methods to discard resin cleaning liquid waste. This also applies to the water-washable resin
SUNLU 3D Printer Resin Detergent - SUNLU official online store
ANYCUBIC Water wash resin Tough Plant UV Resin For LCD 3D Printer 405nm Liquid Photopolymer Sensitive Resin 3D Printing Material - AliExpress
3D Print Resin Cleaner Wash | Phrozen | Phrozen Technology: Resin 3D Printer Manufacturer