When I had bedbugs in an apartment I was renting, I caulked up all the spaces by the baseboards where they could get in, inspected the bed and wrapped it in a bedbug-proof liner, washed and thoroughly dryered all the linens and pillows, and then spread DE all over. I put lids under the bedposts with DE in them. And I moved the bed away from the wall.
That was the end of them. Didn't get another bite.
I'm pretty sure that's not all it does to them.
When I had bedbugs in an apartment I was renting, I caulked up all the spaces by the baseboards where they could get in, inspected the bed and wrapped it in a bedbug-proof liner, washed and thoroughly dryered all the linens and pillows, and then spread DE all over. I put lids under the bedposts with DE in them. And I moved the bed away from the wall.
That was the end of them. Didn't get another bite.