maybe i have a simple view in life but to my way of thinking you either want to have your windows cleaned or you don't
if you give them a price and they want to think about it then in the vast majority of cases it means no.
I wouldn't call back i would invest my time in a new potential customer,ie someone who says yes
Picked up[ a custy thru yell.com gave him a price a week ago(admittedly over the phone)we have had a few text between us,reckons his neighbour is interested,so went round to make sure of the size of house etc and its one of the "linked-detached" houses were the garage of both houses take up the space between the two houses so that means i would need access for both to get thru the garages or climb the garages?...so that's the end of that enquiry,i can just see the problems every time i need to clean
But that's just me