Rear brake grabbing

Occasionally the rear (drum) brake on my bike is grabbing (and squeeking at the same time), which today in the slippy rain wasn’t great… Any idea’s why I might be? I was thinking of cleaning it out, scrubbing the shoes and re-adjust. Given how cheap the shoes are - I might as well jsut replace them. Any wise thoughts?

Remove the wheel and clean the drum and check the brake shaft isn’t sezing lube it with copper slip reassemble

Cheers; i’ll give that a go on the weekend.

How much wear have you got left on the shoes? They might need replacing anyway.