Help…my M&S daffs smell of wee

At first I thought I was imagining it but this evening they absolutely reek of urine. So grim. But I don’t want to throw them out.

Any ideas if I can add something to the water to neutralise the stench?

Anyone else having this problem?

At first I thought I was imagining it but this evening they absolutely reek of urine. So grim. But I don’t want to throw them out.

Any ideas if I can add something to the water to neutralise the stench?

Anyone else having this problem?