its a lot to lose in a month !..... especially since , after the bad weather the windows are bad....
dont take this the wrong way , but have you taken a look at other reasons instead of the recession,
are you polite and approachable?
do you pride yourself on being the best around?
are you organised and regular?
do you think that the customer may think, that you are expensive.
I know we all gain and lose customers, but that is a real hit in one month.
I would be asking myself lots of questions.... not aiming it at you... its just how i would think, if i lost a huge bunch like that.
Gary.