Dust keeps flying out of my clothes even after I wash them. I tried duck tape and trying to vacuum them. That did not work. What else can I try?
You may find that the dirt is coming in your water. Grab a cup of the water with which you're washing your clothes and let it sit for a few days to see if it any dirt settles in the bottom of the cup.
After laundry, you should fold your clothes and put them in drawer of a dresser or something like that. It might just be because your room or the place you live is kind of dusty, and the best way to deal with that is to vacuum your room more frequently, and if dusty clothes is such an issue, you should keep them in drawers rather than hanging in a closet.
The dust and lint trap in the tumbler might be full or nearly plugged and not removing lint and dust as your clothes dry. The tube from the tumbler to the outside vent must be clear from all blockage to work. Sometimes there are birds and rodent nests that must be removed to have the tumbler working efficiently.
Hanging them in front of a powerful fan should blow a lot of the dust away. Or you could do it the natural way, and hang them outside on a windy day. Just make sure they are well secured! Hitting them while they are hanging up (in the wind or near the fan) will help too.