I have used the quilt basting spray that also said to have all the windows and doors opened, but I forgot to open them. It said it smells bad. But I didn't think I could smell anything. But I also know that by law anything that might have a chemical odor to it must read that way. That's some of the things I have to deal with in my job. The EPA wants to protect us. But the only problem I had was it makes other thing in the room sticky. But it cleans up with soap and water. Be sure your sewing machine is not in the same room, or if it is to cover it up. Because it will gum up the insides.