Well done lumpy. Certainly my 6% works well enough given enough UV. Good to know the indications are you can go even lower. Did the increased oxy concentration help with very low concentrations of H2O2 I wonder?
Did you find the immersion technique expensive? Over the counter stuff has a significant markup?
I'm not sure about the increase in the Oxi-Clean helping to offset. It works though! The over the counter stuff is about $2 per litre. I've spent about $30-40 on the stuff, but it's worth it to me... I've cleaned 2 Macs + Peripherals and 2 HD20 cases.