We clean gutters all year round too - on our existing annual gutter clear round our business model was to maximise business through customers that all ready use and trust us, so a very soft sell, it is also said on the phone should you need us before the jan/feb schedule just call and we will come before - its a win win for us.
We also always seek new customers for our other services, however sometimes it can be very cost effective to sit back and think how can I maximise the spend of the customers I already have - and this round works very well like this, a direct call to current customers with an offer has done brilliantly for us - this provides an additional income boost - we do only clear using a gutter vac - and a pair will go out and hit these "scheduled cleans" over the time span - very few have set dates (access only customers) the others are all done ad hocly over the period agreed.
We also do a similar campaign for our pressure washing services, be very aware, that even customers you see regualry may not be fully aware of your full range of services, we have it on all our cards, vans, and ads, and even when we have popped an offer on the next clean card or a letter or on our news letters (which go out 2/3 times a year) we of course get enquiries from it, BUT the biggest up take was a quick phone call offering directly. It is very cost effective (you can do it yourself or can sub it out)
As said for us we do try and look at as many ways as we can to continue growing as this is our goal - so for us, it really makes sense to not just look for "brand new customers only" but to look at ways that our current base could use more of our services.
Good Luck to all
Mrs Smudger.