I use a recently-purchased bamboo large-and-heavy cutting board to cut/chop/dice/slice veggies and fruit. However, my routine is such that I typically dice a red onion at night, and a green apple for breakfast.
I've noticed that the red onion smell and, to some extent, taste gets on my green apple in the morning.
I read online about people treating their cutting board with coconut oil or something before using it. I failed to do that. Is it too late to do it now? Will it solve my problem? Are there other ways to prevent the onion smell-and-taste to get on fruit?