I stand by my advice with the gardz as it makes all the washing down irrelevant. But as said in previous posts both options ate viable and its up to the op to make up their own mind. It's been quite a good debate name calling apart.
Agreed it has its a shame Joe had to start on the name calling tho then carry on instead of admitting he was spouting rubbish.
I still believe sugar soap would be better tho specially in the scenario rms has just stated.
There was no need for the name calling which you did not initiate. We'll just have to agree to disagree in our prefered methods but some good info for the op to refer to though.