As our resident science-chap, here's where we'll ask potentially dumb questions of you. I hope we can all enjoy your eye-rolling and the patronising tone of your responses.

Q1: You know how on cleaning products it tells you not to use with other cleaning products 'cos you might cause a chemical reaction or something, how viable is that? It makes me want to test various combinations to see if I can create a small explosion or a nice plume of purple smoke.