I bought some twine at Home Depot to use to trellis my cukes and was surprised at the smell of it while I was stringing it up. It smells like fuel oil. The packaging says it is 100% sisal and doesn't list anything else. Is this safe to use on my veggies? What is this smell and will whatever treatment used on it wash into my lettuce below? I've already hung it and watered so whatever it is may already have washed into my veggies. I thought twine was an all natural fiber material and that is why I chose to use it in my garden. I am 100% organic gardening and do not want chemicals or treated materials in my garden. Is it safe to use... or should I find another type of rope to use? Thanks.