ol' squeaky used to regularly wee on my hard guitar case.i just sponged it off and the smell wasn't too untoward.
however, several years of accumulated tom cat wee must have made its way into the catches and out of 4 only one remained working, the others corroded and broke.
i was able to replace some with stronger ones from an old suitcase.
he was a funny old cat, one of the biggest anyone had seen, more like a dog in his behaviour.
besides wee-ing on my case, outside we'd sometimes see him sitting in the grid and doing his business like a 'good cat', straight down the drain!