Maybe I'm just doing it wrong, but I'm just not getting accurate (or stunning) results with the gel. It's difficult to apply and I think it creates unreliable results because it ends up foaming with the gas emissions. I soaked the keyboard keys and mouse and they looked awesome, and the solution was active for about 24 hours (still reacting).

The keyboard shell is still slightly yellow, and there's now a sort of 'gradient' – some areas are whiter than others, some look totally new, others look still noticeably yellow.

I think JDW is on to something saying that the concentration of H2O2 isn't important – I used up all of my 13% pretty quick and resorted to a bottle of 3%, and the keyboard keys look brand new. Not only is it cheaper, but it's just as effective.

I've sealed the compact case with vinyl tape which is waterproof (for 24 hrs anyways) and I'm gonna take the plunge (no pun intended) and see if I can get away with dunking the case. I think it will produce more impressive results.