Send her to agency for counseling. If it still doesn't work pls change.. It's dangerous to leave your baby with this sort of person. It doesn't take a genius to know of the dangers of scissors n fan blades n pail of water. you probably have to take leave while waiting for a new maid or consider infant care eventually.
I've already had 3 maids in 5 months n luckily I'm still on maternity leave. Now waiting for my 4th maid n hopefully a good one that can stay cuz I'm returning to work soon. Even with a maid I still send my kids to Childcare. My newborn will go to infant care as well. No time to try her baby care skills.