Androsol in lower doses

I have seen the suggestion of using Androsol in lower ‘maintenance’ doses
during the cycles off weeks, specifically in last weeks “Behind The Scenes”.
It was also suggested that the skin be washed by 8PM. I was wondering what
the reason behind this is. If I use 14 sprays of Androsol after my morning
workout and shower, approximately 8AM, is it really necessary to wash it off
12 hours later? Is there really enough Androsol remaining on the skin after
12 hours to cause T suppression over the long term, even if I don’t
re-apply?