Pore Strips
A pore strip works by adhesion, not by extraction. You wet it, the polymer adhesive bonds to whatever protrudes from the skin, and peeling it off takes that material with it. What comes away and gets inspected afterwards is mostly the tips of sebaceous filaments — the normal structures every nose has — along with the very top of any genuine comedone and a quantity of ordinary surface debris.
That is the honest limit. A blackhead plug extends down into the pore; a strip can only take what it can reach and grip, so it removes the visible top and leaves the rest in place. The pore looks clearer for a day or two and refills on the same schedule it always did, because nothing about sebum production or cell turnover has changed.
The risks are modest but real. Peeling an adhesive off skin takes some stratum corneum with it, which on already-sensitised, retinoid-treated or rosacea-prone skin can leave the area red and reactive for a day. Anyone using an oral retinoid should skip them entirely. Used occasionally on tolerant skin they are harmless, satisfying, and cosmetic. As a treatment for congestion, they are not one: salicylic acid, a retinoid or a clay mask address what a strip cannot reach.