is cleaning the insides that bad 
please tell me getting as much info as poss befoure i take the jump into window cleaning
Cleaning insides isn't difficult if you can use a squeegee. It just takes an awful long time - moving ornaments, curtains, blinds, and even furniture, and then putting it all back again plus as many have said there is a much higher risk of damage including muddy bootprints on the nice cream carpet
Best to get a disclaimer signed first, or tell them to move everything out of the way.
We always charge double for the insides, i.e. if the job is £20, the insides are £40 making a job total of £60 - Always spell it out to the customer so there's no doubt, if you just say 'we charge double for the insides,' they'll expect in and out done for twice the outside price :
