I did some research for a story a while back and apparently most plants in the onion family (garlic, famously, of course, but also leeks etc) are useful for repelling ghosts as well.
This worked very well for my characters because they weren't sure if it was a ghost or someone messing around with them, but they mashed up some oniony stuff and if it was a ghost it would repel it and if it was some random guy it would still sting his eyes anyways, ha ha.
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I did some research for a story a while back and apparently most plants in the onion family (garlic, famously, of course, but also leeks etc) are useful for repelling ghosts as well.
This worked very well for my characters because they weren't sure if it was a ghost or someone messing around with them, but they mashed up some oniony stuff and if it was a ghost it would repel it and if it was some random guy it would still sting his eyes anyways, ha ha.