Unravel, no worries, it's a good question!
I'll just add on to my previous sharing with whatever I knew, seen and did.
I took a bold assumption that they haven't invaded my cabinet yet because:
1) I took action within days of getting bitten and catching a dead 1 on my bed.
2) Haven't found traces and trails of them near my cabinet or the sliding door joints.
3) I have carpeted floor across the entire bedroom, that should slow them down I guess, but that also poses a big headache when performing the treatment
If not, I wouldn't be able to finish in a day judging by how much precision I put in every inch of the room. Luckily, that assumption worked.
Silly me didn't think of bedbugs at the time of renovating my room so I went on to lay carpet on the entire floor haha. So half my spray bottle went onto the carpet and I had to disassemble my bed frame.
If you are worried about your clothings, sheets and stuff throw them all into very hot water (don't need to be boiling hot), your bedsheet, covers as well. These buggers cannot stand hot water. After it's done, seal it up in a bag or something, don't put back into your room or affected area till you properly sanitized the whole place.
Check your bed frame, internal and external plus joints and attached shelves if any, examine thru all the stitches and linings at the edges of your mattress as well.
To be sure that they exist in your home, look out for:
1) concentration or trails of little dots like droppings
2) worm like things wriggling around (bedbug larvae).
3) bedbug shells, they change their "body casing" as they grow.
4) Bedbugs themselves. They look like very young and tiny cockroaches with a fat bottom and they are not necessarily red in colour, they could look beige as well for the young bedbugs or haven't feed in a long while. They have a flat and circular bottom when they haven't feed, and bloated round bottom after feeding.
Extremely tough buggers, I caught a live 1 and used quite some pinching strength before it got crushed.
There's a foreign site that taught both chemical and non chemical methods when I googled previously. Due to my kiasu nature, I employed both methods to exterminate with extreme prejudice
