Glass Towels can go in with your other microfiber towels when you are washing them, or you can wash them separately if you have a bunch of them. Some people have said that the Glass Towels can cause a little linting onto other towels, but I personally haven't had this problem. The edges of the glass towels might curl in some from washing, but it will not impact their effectiveness.
You may have already read this write-up on the forum, but it's also on our website and I'll link it again for anyone that may not have seen it yet: http://adamspolishes.com/how-to-wash-microfiber-towels
As for the Wash Pad, you do NOT want to wash those with your microfiber towels, as they are made of a synthetic material and not microfiber. I would say to avoid putting wash pads in a washing machine or dryer entirely. Instead, rinse them out as soon as you are done washing the vehicle - take the Grit Guard out of your bucket and set it on the ground, then place the Wash Pad on top of it and blast it out with the hose, holding the Wash Pad with one hand to make sure it doesn't fall off onto the ground and pick up more contaminants. I will then visually inspect it and hand-pick out any larger dirt particles that the hose did not remove. Finally I let them air dry, hanging off of the side of my 5 gallon Wash Buckets.