RV plywood cleaning stains and repair

First time owning a 1996 Coachman 300 QB RV. Long story short trying to save money I asked someone to help me with the floor inside the RV. What happened was they ripped half the carpet up and and The linoleum and left a bare plywood base. Since then there has been milk spilled soda spills and any other kind of liquid spills. I’m asking for any advice on how to clean the plywood without making it warp so that I can either seal it and put new carpet on I’m just at a loss right now any advice would be helpful there is water damage in one corner by the driver area no where else That I can see but what should I use to clean the plywood and not further damage. Thanks in advance. Not super crafty but if someone gives me directions I’m sure I can figure it out.