Tips for cleaning this floor?

[Breezebutter]

Apologies for the gross photo! Got a cupboard in my kitchen under the stairs which is where I keep my fridge/freezer. I went on holiday for 2 months and my DM forgot to empty and turn off my fridge for me so there’s a few stains and watermarks from when it leaked. It seems to be almost like chipboard and it’s quite thin. Don’t want to ruin it any further. Anyone know how I can go about cleaning it? Some of the more minor stains were there when I moved in so could have been there for 5+ years, darkest ones are mine

If you're just going to put your fridge back I wouldn't worry. I don't think the actual stains will come out, they are probably deposition marks from minerals etc in the liquid that leaked.

I’ve moved it into the corner but most of the stains were there when I moved in. It’s private rent so a bit worried about the deposit but if it was already stained I should be fine. I’ll just chuck a little rug over it or something

Sugar soap?

For the cupboard with an off cut of lino