what to do when everything has condensation

I live in the uk and it’s winter, this time of year all the walls are rlly wet with condensation on nights that it hasn’t even rained. Is there any way around this as every time I try paint atm it just kind of slides down the wall a few inches in places. proper annoying I was thinking about just bringing a towel and n drying it like that but weren’t sure if there was a better way?