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How CleanSL8 runs its back office with Dull

A London cleaning company hands invoicing, follow-ups and admin to the system that became Dull.

The Dull team·November 10, 2026

CleanSL8

CleanSL8 is our own cleaning company in London. Like most service businesses, the work that keeps it alive isn’t only the cleaning. It’s the invoices, the follow-ups, the booking emails and the paperwork that come with every job.

For a long time that work landed on our desks at the end of the day. Invoices went out late, overdue accounts waited until someone had time to chase them, and the inbox decided what got done.

Build the back office once, then run it every week

Rather than hire an office manager, we wrote down how each back-office job should be done, collected real examples of good work, and built a system to run that process the same way every week, with a person approving anything that involved money or judgment.

That system now sends invoices when jobs are finished, follows up on overdue accounts on a set schedule, and keeps records and the inbox under control.

“The admin used to be what we did at 10pm. Now we read a short update and make the two or three calls that actually need us.”

From one company to Dull

Dull runs the same process for other businesses. Each client gets the work done in their own tools, a weekly report, and one point of contact on our team.

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