After use, please don’t leave standing in water.
To dispose of your toothbrush, place in your ordinary bin. Over time, all but the bristles will biodegrade, leaving no residue.
Alternatively, you can pull out the bristles with a pair of pliers and re-use the Truthbrush in any creative way you can. Plant canes and paint stirrers are just a couple of examples of how you can give your Truthbrush a second life.