Jean B. wrote:

> Janet Baraclough wrote:
>
>> You can buy a spray at the vet, which will neutralise the smell to
>> human perception and also deter the cat from spraying that area again.
>> In the UK the brandname is Feliway.
>>
>> Janet
>
>
> There are other things like Nature's Miracle, IIRC. But, again, you
> need to find all of the favored spots.
>
> To some degree, too, a Feliway diffuser works to deter a cat from
> spraying--but we'd need to have an awful lot of them.
>

Urine glows under ultra violet light. You can buy special lights from
pet supply companies or you can use leftover Haloween or rave accessories.