I have three Langstroth hives.
I had hive beetles the first time that I opened the hives.
They were the missing bugs that was my clue that the hive starved to death.
Hubby and I like to go watch the bees coming and going, and interact with them, without getting into the hive. I do open it from time to time just to look around and see if I see food, pollen, brood and/or the hive building up queen and drone cells preparing to swarm.
I plan to order a product called Beatle Jail, it goes across the front of the hive and traps the beetles before they get in there to mess up your honey.
On You Tube there were several videos of dealing with pests in hives. One used tea tree oil, another used powdered sugar... both of those are less toxic than most chemicals.
Lesson #2. Don't bring old frames inside your home, with pollen etc. on them.
When the hive died, I rescued the frames so wax moths wouldn't eat all the wax up. I brought them inside, cut the wax off the frames and bagged it all up, to be able to give them back to the bees later. They were so nicely put away in little zip lock bags, and arranged in larger zip lock bags!
I didn't look into the box again for awhile. Suddenly, I had moths all over my house, they were all over my windows... inside!
I finally tracked them to the box of... what had been bags of wax.
Apparently there were eggs in there, and they hatched, ate the pollen and wax, and grew up... I had cocoons of moths in corners here and there and moths flying all around! What a mess! There were even maggot looking things all inside the box, baby moths I guess?
If you bring used wax inside, either melt it immediately, or freeze it immediately, unless you like a house full of moths and cocoons!
I like my bees, but it has been an interesting learning curve for me.
I still have to double check anything, not used daily, I will find cocoons in some of the oddest places!