The missus spilt milk in boot of A6 a few weeks ago, in and it flowed up under back seats..
Left it for 2 weeks to annoy her.. I had to remove seats and all carpet and power wash the fuck out of them, then used washing up liquid and washing powder then comford to wash them,had to do it three times.
Then had to wash the spare wheel well & spare wheel everything. Powerwasher hot wash if you can find one..
Bought a rubber boot liner after that and now that has milk on it as well.