How to sell cleaning

What is the best method for marketing your janitorial service?
How do you get appointments to present your service to the decision makers?
How do you get past the receptionist, administrative assistant or gatekeeper?

Some of the most common and frequent complaints I here from fellow cleaning contractors are:

I've written dozens of letters, nobody calls

I can't just walk in without an appointment, can I?

The sign says "no soliciting"

Everytime I try calling or telemarketing they hang up on me

I get the feeling my brochures go right in the trash

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