Airplane lavatories are nobody's favourite part of flying. They're cramped, the surfaces get touched by everyone, and there's no window to crack open or fan that actually does much. The one thing you can control — the smell — turns out to have a simple fix that flight attendants wish more passengers knew about: a tiny bottle of Poo-Pourri Before-You-Go Toilet Spray.

The product works differently from a regular air freshener. It's oil-based, so when you spritz it into the bowl before sitting down, it forms a thin film on the water's surface that traps odours underneath until everything gets flushed away. The travel version comes in a one-ounce bottle that clears TSA liquid limits and slips into a pocket — discreet enough that your seatmates never need to know. Crew recommend three to five sprays directly into the bowl before you go, then flush as normal.

Why does this matter beyond personal dignity? Seats near the lavatory tend to absorb whatever lingers in the air, and on a packed long-haul flight those smells stick around. A quick spray is arguably a courtesy to everyone in rows 30-something. It's a small, cheap item that can genuinely make a flight more pleasant for you and the people around you.

If you can't track down Poo-Pourri before your trip, there are workarounds. Bath & Body Works room spray isn't designed for the job but offers decent cover. Some travellers line the toilet seat — and even the inside of the bowl — with paper to keep things clean, though there's a small clog risk, so go easy. Another odd but effective trick: ask a flight attendant for coffee grounds, which absorb odours and which crew will usually happily provide to anyone considerate enough to ask. And at the very least, the blue sanitising water in the bowl does some work — so a courtesy flush never hurts.

None of this is glamorous travel advice, but it's exactly the kind of thing seasoned flyers and cabin crew actually pack. Throw a pocket spray in your carry-on and the smallest room on the plane becomes a little less dreaded.