Do you know that nasty gunk that builds up in the drains and in the overfill drain? I know ours gets really gross because the kids have accidentally spat toothpaste in it a few times and cleaning it as a nightmare. 😳 I kept seeing ads for the foam cleaner that clears out the entire drainage system, and finally got some to try. YOU GUYS. 🤮 I’ll spare the details and gross pics/video but two of our 4 sinks had some very sketchy black gunk (mold??) come out. Place the top of the bottle on the overfill drain and do one firm solid push until the foam is coming out of the main drain. Then just leave the foam there to work its magic and repeat if needed! LTKFamily LTKHome