I realized that the cartridges had this liquid that looks like some type of oil. It is yellowish towards a brown tone. The packaging is completely closed and expires in 2027. Does anyone know what it is? If it's contaminated or it's the sterilizing chemical that went bad or what's up. Obviously I'm not going to use them because I'm concerned about the safety of my clients. But there are only 4 cartridges in the entire box they came in, the other cartridges look clean and I want to know what you think and what you recommend doing. I appreciate any information or advice you have on this.