I made my first room spray about a week ago: 3 oz WSP Room/linen spray base 1 oz Bert's FO - Black Raspberry Vanilla No Color 4 oz WSP alumnium bullet spray bottle So far in testing, it has worked great. The scent lingers around for hours. I just noticed that in my bathroom, I have ceramic tile flooring, it seems to get oily on the ground. I have hardwood floors everywhere else and I don't see or feel it anywhere else except the bathroom. It's not really noticable during the day, mostly right after I shower and there is a mixture of steam and the oil. I almost feel last night and I am 8 months pregnant. Could it be that I am using too much fragrance oil? I am going to try and make another one using .5 oz and see how that does. Could anyone who uses the WSP base tell me if I am adding too much FO.