On 31 May, 20:42, Colin Wilson
o.uk wrote:
The white patch looks & smells like crystalised urine and is right
under the toilet so I ripped the laminate flooring to reveal a few
crystally urine marks.

Something was recommended in here the other day for urine smells -
prochem urine neutralizer

Thanks Colin.

I spoke to Express Cleaning Supplies today, the lady I spoke to said
it might not work on urine once it has crystalised. I'm more worried
about the insulation and whatever else underneath to be honest.