Basset Hound urine smell in car boot

Car boot carpet is one of the toughest spots for dog urine odour — it builds up with every trip, the smell bakes in when the car gets warm, and standard car sprays just mask it temporarily. The only thing that permanently eliminates urine odour is an enzyme-based cleaner, which breaks down the uric acid crystals that hold the smell. Anything else and your Basset will keep getting drawn back to the same spot. Before I point you to the right product — is this odour from multiple incidents over time, or do you think there's one main soaked area? And does the carpet feel damp after trips, or is it a dry set-in problem at this point?

That's classic set-in uric acid — the crystals are deep in the carpet fibres and underlay, and warmth reactivates them, which is why it gets worse on hot days. Fabric freshener sits on top and does nothing to the crystals underneath. A few quick questions about your Basset: is he neutered? Intact male Bassets produce particularly concentrated, pungent urine, which changes how thoroughly you need to saturate the carpet. And roughly how large an area are we talking — the full boot floor, or more localised?

Good to know — neutered helps, but Bassets are a heavy, low-slung breed and they do tend to produce a strong-smelling urine regardless. For a whole boot floor with months of set-in odour, I'd go with Simple Solution Extreme Pet Stain & Odour Remover. It's a professional-strength enzyme formula specifically built for heavy, repeated soiling — the standard Simple Solution works for fresh accidents, but the Extreme version has a higher enzyme concentration that's far better suited to deep-set, layered contamination like yours. The key with set-in carpet is application: you need to saturate the carpet properly, not just spray the surface, then cover it with a plastic bag for 10–15 minutes so it doesn't dry out before the enzymes can work. For a full boot floor, use it generously — a litre bottle won't feel like too much. It's widely available on Amazon UK and comes in litre and larger sizes.

Before applying, vacuum thoroughly to get any dried debris out — that just gets in the way of the enzymes reaching the fibres. Don't use any other cleaner first, especially nothing with bleach or ammonia, as those deactivate enzymes. One thorough treatment may not be enough for months of buildup — be realistic and plan for two rounds. Do the first application, let it fully dry (don't rush this with heat — air dry naturally), then smell-test it on a warm day. If there's still residual odour, do a second pass focused on the strongest areas. Also worth putting a washable boot liner down going forward — it protects the carpet and you can just pull it out and treat it easily after each trip rather than retreating the car carpet.

Yes — Bassets have more sebaceous glands than most breeds, which gives them that distinctive houndy body odour on top of the urine smell, and their skin and coat can transfer scent to surfaces they lie on. So even once the urine odour is gone, you might still get a background 'dog smell' in the boot from coat contact. A washable boot liner really earns its keep with Bassets — something like a quilted liner you can put through the washing machine weekly. For the liner itself, a standard pet-safe laundry additive like Bio Laundry Detergent or a pet odour laundry booster handles the ongoing coat smell. The enzyme cleaner deals with the urine; the liner routine handles everything else.