Uneaten cricket removal, catching tips?

Hi,

I have an established adult tarantula (b. boehmi) as my first T. I try to feed it about 5 crickets every 2 weeks. I have heard to remove uneaten crickets after 48 hours or so. I tried to create a naturalistic setup for it with big dead leaves and a nice hide, and these spots have proven excellent hiding spots for the uneaten feeder crickets! Mine tends to eat about 2 every feeding, leaving the less delicious or faster crickets behind.

I am also quite inept at catching them with tongs. How concerned should I be about these guys hanging out, and do you have any tips for catching them? I am aware of the symptoms of premolt and would be a lot more concerned if my guy was refusing food, which it isn't. Mine is also sensitive to my incursions into its home-it went into full threat posture when I tried to clean the sides with a crumpled paper towel (roughly spider-sized) so I am trying to balance established best husbandry practices with not stressing out my T. What should I do?