Trees, pollen and the autumn entry
Mature trees are one of the things people like about living here, and they are also where most of the extra dust comes from. From April to June pollen settles on sills and screens; from October the entry and mudroom take the leaf grit.
A recurring plan absorbs that better than calling someone in when it gets bad: 20% off weekly, 15% off every two weeks or 10% off monthly, no contract, and a pause on 48 hours notice.