a note of caution if you use mouth wash

I always used mouth wash,but not any more.
We had a brand new toilet fitted and after a little while the bottom part of toilet bowl started to turn blue,strange.
Then I recall we spat the mouth wash down the toilet,
and this was the issue with the bottom of the toilet bowl going blue.
Its up to the individual what they do,but if mouth wash can do that to a ceramic toilet bowl,heavens for bid what it can to the inside of your mouth.After brushing my teeth,I use salted water to gargle.