mmm ok, i can't do without my bleach
fair enough, we all have our own ways of doing things.
But by adding it to the main wash, you get no bleaching effect from the chlorine bleach, no bleaching effect from the oxygen bleach in the detergent, and no enzyme effect, so results will theoretically be on par with using a non-bio liquid.
There is an ongoing debate on here about whether or not chlorine bleach will actually corrode the drum spider in a washing machine, personally I see no reason to risk it (especially not with a brand new machine).
My recommendation if you really do still want to use bleach would be:
follow the doses on the bottle of bleach, with the domestos I have to hand thats 15ml per 5 litres of water. Find an appropriate container mix bleach and TAP COLD water (chlorine bleach is less effective in warm water, found that out on here and personal experience shows this too) add clothes and swish around, then soak overnight.
Next day put the soaked clothes through a rinse and spin programe on your machine (not just the final rinse, the full cottons rinses), then run your normal cycle with detergent and WITHOUT bleach.
Quite an involved process, but I guess that's why I only use chlorine bleach as a last resort, having tried everything else
Matt