When we made the offerings for Dia de los Muertos, we left out water. I asked other families, and they told me you customarily leave oranges, and bread, and you leave salt in the shape of a cross to symbolize something good for the returning dead. You also light a candle for each person that had died in your family, so they could find their way back to you during the festival of the dead… I have all of these aunts and random people, tons of them, on my mom’s side, and eight on my dad’s side, so it was a lot of candles. But I didn’t understand about the water, so I asked my dad for the explanation…
Water represents light, like a lighthouse, leading them (the dead), asking them, showing them the way like a beacon, making sure they go to the right house.
Also you’re not allowed to put out the candles, they HAVE to die out themselves. But as for the water, dad said that if you saw bubbles in it the next morning, you know that they visited… I believed it as a kid, but I’m pretty sure it always had bubbles, no matter what…
How did you come across this folklore: “I refer to these as “sketchy stories from my (step)father”/sketchy things he did when I was a kid…”
Other information: “My dad has a lot of stories like these, but my mom was big on not sharing them, or letting us hear them—so I heard this in my teens, when were allowed (finally) to ask and he would actually answer… my mom said it would invite bad people/things to us or something…”
This ritual is almost like a more spiritual version of what kids are taught to do for Santa, leaving out cookies the night of Christmas Eve and in the morning there would be bitemarks or crumbs as evidence that he had visited. But Dia de los Muertos is not quite as commercialized of a holiday, and unlike Christmas, offers another opportunity to connect with the dead.