a suggestion to your players though
try ask questions
when you go into a dark room try "I search for any torchs or anything that can provide light. I search for abnormal signs of any possible encounters, I am on guard and ready for an ambush. I search for noises..."
such as this. and if you met a man, try ask "how tall is this man? have I met him before? can I find something odd about him? I will examine his hand from a distance, looking for rings and other things that can possibly reveal his identity..."
things like this would be good for us all