i wouldn't fear using wetter unless for some reason you absolutely have to have an open system, which would preclude the use of any fragrant or poisonous fluids.
BTW, some can't smell wetter as well as others (genetics & smoking). to me it smells very strong, like 70% anti-freeze (has a marking scent that smells like maple syrup) & 30% soap (Majic Bubbles, the kind kids blow bubbles with). i'm not 100% sure if the evaporated wetter is toxic (it is if it is contains E-G), but i bet it's not good for you.
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