Because I have a brand new clean mouth, and I'm brushing correctly and flossing, I said to myself "why not get some disclosing tablets"?

I've never used these.

I looked it up on the internet and it showed photos before and after of what the red tablets disclose.

I mean, WOW, people really get to find out where in their mouth, they need to brush more effectively.

I just went to CVS and other drug stores and no one sells disclosing tablets.

My question is "where does a person buy this item", and do you think it's a good idea to use this?

Thanks much

Melody
P.S. The red dye DOES come off, right?