Clashing with MIL over folk remedies for daughter

My MIL moved in with us some time ago due to serious financial hardships on her end and it's been a... mostly (?) smooth transition, but there's one major issue that keeps rearing its ugly head. She is a proud Hispanic woman who believes strongly in naturopathic folk remedies and she is very angry that my husband and I are treating our 4yo's (mild, run-of-the-mill) ailments like ear infections or colds with conventional western medicine.Some of her beliefs are pretty harmless: oatmeal baths for fevers, putting string on the forehead for hiccups, stuff like that. But other stuff is downright dangerous. For instance, she one time threw out all of our ibuprofen because she said we don't need it and that we should only use aspirin for both us and our daughter (she doesn't believe in Reye's Syndrome and thinks aspirin is better because it's more natural). She believes in ear candling (taking a hollow candle and putting it in the child's ear, then lighting the end on fire to release pressure on the canal) and/or pouring warm/hot oil in to ear canals for ear infections.When I caught her attempting to ear candle our daughter, I didn't react particularly gracefully (I was effing pissed because it seemed dangerous and my subsequent research confirmed it). So now she is claiming that I'm trying to keep my daughter from her cultural heritage and that I am an arrogant American who thinks that folk remedies have no value. My husband is a little biased because his mom did this stuff with him when he was younger and he's "fine," but we have a united front in person. now though, things are so so awkward and I'm not sure how to get them back to a good place.I know putting down boundaries is important and we've been doing that, but how do you keep the relationship going well too? She's a great grandma, we just completely disagree on medicine. she will likely live with us until she dies so it's not like i can just ignore her - we have to learn to live together.eta I'll admit that in the past I've definitely cited studies to her and told her things like "that's not supported by any evidence/clinical trials/etc" and it's only served to agitate her. and I think she reacted defensively because when I was angry, I had pretty firm words about the danger to lack of scientific evidence ratio. so i haven't been perfect either, but i'm not sure how to balance sticking to my guns about dangerous stuff while not being a total science-evangelist to someone who isn't going to change via /r/Parenting https://ift.tt/2zpnKGm