yeah hard water here
a good hard hit and a decent torx bit
worked every time
we have a ratchet with a metal tube fixed to it which gives a bit of extra leaverage
need a new torx bit every approx ten shaft changes
but they only cost us £3.50 for the hardened one
Same here, the soft water must get at them, no amount of bashing would shift 95{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the ones I come across.