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
How To Dispose Of 3D Resin Printing Liquids & Waste - What To Do With Toxic 3D Resin Printer Fluids - YouTube
3D printer hardens waste resin for safe disposal
What Are the Best (and Cheapest) Ways to Dispose of Ion Exchange Resins? - SAMCO Technologies
How to Dispose of Resin: 5 Things You Must Know - Resin Obsession
Disposing of resin tanks
The Right Way To Dispose Of Epoxy Resin
Water-Washable Resin 101: Everything You Need to Know Before Getting O | Phrozen Technology: Resin 3D Printing Blogs