The bottle is designed such that when you place it on the worktop, with the cap open, a jet of powder shoots up from the bottle and engulfs you! Impossible not to breath it in! Once you have cleaned your item in the washing up bowl, etc, you end up with a powdery residue in the bowl itself, which takes several attempts to rinse off. Used with a moist scourer on stained mugs, didn't seem to make much difference. Tried with burnt on grease on hard annodised pans - didn't shift it. The pans did lighten in colour somewhat, so it shifted some dirt, but the black marks stayed behind.