When we encounter a tough-to-remove stain on a surface, our first inclination is to throw every product in the cleaning ...

A: Some situations are safe, others are clearly not safe. And sometimes it depends on the kind of bleach — a chlorine formula ...

And sometimes it depends on the kind of bleach — a chlorine formula? or one free of chlorine? — or the concentration and dwell time (how long the bleach is in contact with a material).