Leave the toilet brush to dry before putting it back
There are few objects more disgusting than toilet brushes, other than the toilet itself, perhaps. That is why we would not blame you if you wished to put it back in its holder after you used it and forget about it forever. But be careful, putting it away while still wet might make the problem even worse.
It is never a good idea to put damp items away since it makes it easier for mold and mildew to grow. Besides, stagnant water can begin to smell very nasty, and you would not want the stench of dampness to combine with the stench of poop. Next time you use the toilet brush, dip it in some sanitizer and leave it outside to dry before putting it back.