lol yes I fully appreciate my blunt wood chisel isn't the right tool for the job! I'm just saying, after I've tried my screwdriver, and it just slips straight out because theres no purchase at all, that sometimes I have luck with a chisel, and when you're a subby on a job changing a tap, you'll do whatever it takes to get that gland turned!!
Anyway, I know to use a hex key now!!