My players are brand new to pen and paper games. They seem to get bogged down looking for every little hidden thing. Today we were playing through Debts to Pay. Halfway through the mining facility one of the players wanted to go back to every room and look for hidden compartments behind paintings. I hadn't even mentioned paintings aside from the holographic images in the main entrance described in the book.
At the same time, they seem to miss obvious things. Maybe they were tired of searching but by the time they got to the office they didn't even ask about anything under the table (though they tried moving the filing cabinets in the same room and looking behind them). So they missed the safe.
How do I, as a GM, guide them through what is important without making everything so obvious? I'm sure part of it is working on my descriptions, but this time I was going off of a published adventure and reading what was provided. Not saying I couldn't adjust it, but it wouldn't necessarily be my abilities at fault.