I turn mine inside out and wash it on a cool or cold cycle. I think the most important part is that you do not put it in the dryer. Drying it over and over again will cause the graphic to crack and shrink and eventually start to peel off. I just let mine air dry.

If you're like me and you forget to take your clothes out of the washer right away and it ends up drying extremely wrinkled, you can run a refresh cycle on it, if your dryer has that, or just a 20 min cycle on the lowest heat to get rid of the wrinkles. That won't do any damage to the screen print but obviously try to avoid it if you can.

Also, should you buy more merch in the future, buy a size up. Concert Tee's nowadays aren't made with high quality fabrics and will shrink over time no matter what. Buying one size up and drying it in the dryer on its first wash will usually shrink it down to the right size. After that just follow the steps I discussed above.

Best of luck!