How do you make the Routine EL9 solution? It wouldn't be a sci-fi horror if we weren't mixing chemicals in test tubes, and Routine doesn't disappoint. The EL9 solution is essential to progress through the Annex station and upgrade your security clearance, but the formula to make it is locked behind a fiendish logic puzzle. Before you can head into the Main Control Lab and retrieve William Davis' ID, you need to proceed through the decontamination chamber. That's where the EL9 solution comes in. You need to take a quick detour through the Main Wing to reach the Disinfectation Compiler in Routine. Once you're in, it's just a case of plugging the right chemicals into the terminal and testing the compound.Read the full story on PCGamesN: How to make the EL9 solution in Routine