Mayhem blitz part one sone questions about use!

[Bayonett Priest]

my thing is i watched the mayhem tutorial and had some question!?

the normal steps are:

1. 250ml part 1 to 750 distilled water

2. radiator in an angle and fill it and by filling shake a bit to have all the air out

3. close the rad and shake a bit and wait 12 hours(should i shake inbetween a bit as well?).

4. extract and flush the rad with distilled water 2-3 times AND here is my question  is flushing 3 times realy enough to get all the acid out? this will be my first clean and loop!