My new airline have a policy allowing pilots to use the sims whenever they are not in use for self-directed practice, and as somebody moving on to long haul, I hope to try to get in once every month or so to bash through a bit of raw data circuits, approaches and failures.
There also needs to be a qualified panel operator to run the box, so at our place it's not easy to organised on a regular and frequent basis.
Ask the simulator maintenance department, and see if they have a tech that can run the panel for you