In case you've not done one of these : flip off that black plastic oval on the rear of the drum . Now you can access the star-wheel with a flat blade screwdriver tip . FIRST : release the drum brake and then click the adjuster
a half a turn . Re-apply the brake as see if it's a tighter grip . You can also reset the linkage if you need to get some adjustment-later-on , without using the star-turn .