Hi Matthew,
Glad the results are getting better.
I am glad you said it took you ages as first cleans always do!!
On average a first clean will take 2 sometimes 3 times as long as normal. If you are converting your round in one hit the only way to keep up is to work 6 days. Alternatively as others have said, convert customers over in blocks. Maybe do your biggest accounts first, or any leaded or awkward houses.
Glad its getting better for you, it reall is just a matter of time and practice.
Any more help please just ask.
Best wishes,
Trev