how to get a dad to understand what is dangerous

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my daughter goes to her dad's house every second weekend. i've discussed with him what is dangerous for kids but appearently i left out some common sence things thinking he'd know better. one day my daughter was there, he called and said "you should see what's she's doing it's so cute". then he tells me that she wathed him spray air freshiner around the house so he said she grabbed the can and is spraying it around. i couldn't beleive it that he was calling to say how cute this was. the first thing i said was take the can from her and read it. and asked him to read out loud. he read. "poison, keep out of reach of children, could explode". i couldn't beleive it. this is not the first thing he's done like this. i told him to go take a parenting course but he doesn't think he needs it. she was 18 months when this happend. he had also admitted to me he holds her under the ceiling fan where she can reach when it's on just to make me mad. why put his daughter at risk just to make me mad. i don't get what that's going to prove.