...Guusje:Spray a good 40 times or so. So all old perfume is gone from the sprayer and the little tube.Then try again: chances are the perfume is fine after that :) I've noticed this too. The plastic in the tube must be reacting with the perfume somehow, but the "juice" in the glass bottle is "being safe". For the same reason it might be better to use glass bottles for decants and samples, especially if you want to hold on to them for a long time.