I'm thinking it's the plastic containers. I think the smell will disappear when you wash the fabric. Do you think you have an extra sensitive nose? My daughter does--when we traveled when she was a teen she could smell things miles before the rest of us did. Things like a cattle farm--she could smell it long before we could see it. Maybe you could get a package of cheap wash cloths and wet them with the lavender water and place around the room for a short time and remove them before the smell becomes too strong. Hope you solve this problem before it drives you crazy!!!
Sue