2001 5.3 fuel injector question

Hi all, I am in the process of replacing head gaskets on on my 5.3. Also removed my injectors to clean the intake. My question is how can I clean my injectors now ? Can I soak them in cleaner or spray them with cleaner and use air to blow them out ? Or should I just leave them alone ? The truck ran great before I took it apart but was burning coolant at a fast rate. thanks

Leave them alone.