Let's talk about cleaning, consider this a wake up call to those oblivious to neglected aspects of their house and then, perhaps, discuss DIY cleaning methods.

I'm going to bring up some areas of your house and on a scale of 1 to 10, 1 being completely filthy and 10 being immaculately clean, you have to tell me how clean these parts of your living space is. Write a note alongside it explaining details if you desire.

Bathroom sinks
Bathroom tub/shower
Bathroom toilet
Bedroom
Hallways
Living Room
Kitchen, in general
Kitchen sink
Kitchen stove (on the surface, sides, and underneath)
Refrigerator (inside, surface, and underneath)
Windows and window sills
Hard-to-reach crevices throughout your house
Garage
Front porch
Sides of the house
Backyard

Keeping your house clean should be a priority. The condition of your living space is a reflection of how you are as a person.

Reconsider the designs of your living space. Hard-to-reach crevices are the devil, they make more work for you and are great places for dust to collect. Don't butt your furniture against the wall, always leave enough space so you could push a vacuum cleaner behind it.