I steamed EVERYTHING OP. I took the mattress off & the base out, & lifted up the slats (its a storage bed). Then methodically I did the whole thing - into the nuts & bolts & brackets that sit in the corner, both the inside & outside of the frame, the whole headboard, the mdf base, the feet where it met the bed, & the floor. EVERY space. I pulled it out from the wall too.
The mattress got extra attention, I pulled the piping aside & went down every single seam plus of copurse the mattress itself & into the buttons. I would say I held the seamer on each part for a few seconds.
Then the floor/skirting boards, & bedside cabinets (which Id emptied out & sprayed the contents).
Then I sprayed bedbug spray everywhere - but not as much as the steaming. I didnt spray loads.
Then I set off two or three smoke bombs & went for a walk. Left it a while came back & put the new special zip up mattress cover on, put the bed back together & sprinkled that earth at the bottom of the feet & on the floor under the mdf base (I also have clothes moths which were in the carpet under the base, lovely).
I have not seen once since. And since the little bastards breed like crazy & that was a year ago I would know.
I did something to the bedding, cant remember, a super hot wash I think. If I had to do it again I would steam the duvet & pillows too, then wash them in a hot wash. The storage bed had a ton of stuff in it & I didnt have to wash it all. Though it was all taken out & some washed.
I freaked when I had them. Just disgusting. All the articles say you can get them yourself but you can. I suggest taking things out & spraying/smoke bombing them, then taking everything apart & doing it. As far as I know they were mostly on my mattres though & if I missed some it doesnt matter as they cant get through the special cover & after 2 years will die. Good luck!!!!