I have been using Vuse vape pods for over a year now and I have purchased many cartridges that have leaked.. Some wayy more than others but it isn't very pleasant let alone these are very pricey and it is a waste of my hard earned money to purchase them and not to get my moneys worth due to leaking... This has happened on several occasions .. Thank you for your time User's recommendation: Cartridges may leak oil ...be careful.