D. T. are usually around, when you have Borstels frolicking your carpet or concrete floor, AFTER you vacuumed everything. They love to collect dust and make it sticky. They do not care for gravity and might look like dusty spider webs on first glance. I fear that they are just a symptom for a more dangerous monster - that the dangerous monster starts cocooning or building a nest like this.
How to fight it
Since I fear that it is a nest for a more dangerous monster, clean it away as soon as you find one. They do not resist, but they can be persistent. D. T. themselves are just dangerous as shelter for other monsters.gab