Yes it happens quite often to me... They just don't close really well sometimes either. So the juice evaporates over time. I was thinking about getting 5ml plastic decant sprayers. I sometimes have 3 2ml samples of a fragrance so maybe I could just fill it in there for much better application and hopefully no leakage... I'm not too much a fan of these roller/stick/splash samples. A little cheap sprayer works much better imo. Even if it doesn't spray as good you can still spray more and usually they don't leak all the time or you spill some juice all over it when applying..