She then gave a whistlestop tour of the property, saying: "Things I do to sabotage my landlord’s showings that just make sense."
The sequence begins with Katie placing a bottle of drain unblocker next to the shower to indicate her daily struggle to clear the plughole, before moving aside the bathroom bin to reveal the “horrible wall and plaster that’s fallen”.
Katie unveiled the flat in all its natural glory
The rest of the video sees her strategically placing other items to uncover cracks in the wall, and displaying the two dehumidifiers she needs just to make the place less damp.
She then shows off a “scary nail” that she found in the closet.
The clip has racked up more than 400,000 views on the platform in less than a week, with fellow TikTokers in awe of her savvy move.
“This isn’t sabotage, you’re just showing off the features,” one wrote.
Another preemptively jumped to Katie’s defence, saying: "Anyone confused and thinking she’s petty has never rented. Most landlords will never fix a thing, no matter how much you show them."
A third agreed, saying: “If (the landlord) didn’t want people seeing those issues, maybe he should fix them.”
Fellow TikTokers praised Katie for ‘showing off’ the flat’s ‘features’
Meanwhile, other commentators shared similar personal experiences.
One said: “I once went to a walkthrough and the existing tenants taped a piece of paper to the bedroom door that said ‘spider count’ with tallies."
While another reminisced: “One time I went to a showing and when the landlord left the room, the tenant handed me a handwritten note of reasons not to live there."
And another said: “My landlord has a showing tomorrow and this reminded me to reposition the dehumidifier.”
So landlords be warned: your tenants may strike back unless you treat them with decency...