I did it last week and then again last night with a tee shirt. I left the shirt on for about 45 minutes then dried with the diffuser attachment. I actually wore my hair out of the house today, loose, for the first time ever in a wash n go situation. Last week I put it up in a puff after plopping.
I hate the way my hair feels right now because I only co-washed and added a bunch of products after. My hair looks dull and my scalp is a little itchy, so I'm gonna wash it again tomorrow. Overall I'm happy with plopping but I still want to experiment with different techniques and products for maximum clumpability.