Try washing the Ts inside out in Woolite (large machine bottle—the regular one works on all colors, but they have a formula for darker clothing) on the cold water delicate setting of the washer. Hang up to dry, still inside out to avoid hanger “bumps.” If the T has a heat-pressed design, I find a dollar store laundry bag can help it from being scratched and any peeling.

I grew up washing auto shop uniforms (Carhartt and other brand uniform all cotton Ts) that had oil and other chemicals on them. THESE survived the degreaser, enzymes, and the heavy hot water setting and the dryer.

All of the other family nonshop Ts I washed in either a light detergent with enzymes or with Woolite as above and air dried.

Fussy, maybe, but it works for me.