What’s the cause of this ?

Noticed this started happening yesterday. What can it be from ? I try to keep humidity around 65-70 maybe once or twice a week my humidifier runs out before I even realise and levels get as low as 32rh for possibly a couple hours at a time can this be a main reason ? Temps are also pretty high around 95-100 during the day and around 80 at night. Using FFOF. Any help is greatly appreciated. Thank you

Don’t think pics uploaded in post

Temps like that usually cause problems sooner than later. But it looks like it has something to do more with your water.

Do u have drainage holes? Yes thats very hot