Bathroom steam/dehumidifier?

[MsFrazzles]

We recently moved into a 12-year old terraced house. Our en-suite bathroom has no window (it's in middle of the house). It has a crappy extractor fan which we always have on when showering (and for ages afterwards) but it's pretty feeble.

The bathroom gets so steamy when we shower. I know you're supposed to keep the door shut when the extractor's on, but it gets less steamy if we leave the door open and the bedroom window open. But now it's too cold to have the bedroom window open when showering as it's freezing!

I'm worried about the bathroom getting damp and mouldy as it does seem to smell a bit fusty and there are slightly mouldy skirting boards/grouting.

Thought about getting a dehumidifer to run while/after showering, but if these too work best with the door shut, how could we do that when there's no plug in the bathroom?

Any ideas, wise MNers?

not a good idea to have any type of freestanding mains electric appliance inside a bathroom because of the risk of electrocution. i beleive any electrical item in a bathroom has to be fixdd so you cannot reach it and water at the same time. probably best to replace extractor with something more powerfull. ours work best if door to house is ajar so warm air comes in to replace steamy air

Prop the door open and stand a good dehumidifier just outside. Do this AFTER the water is turned off to be on the safe side
Don't put it in the bathroom or run it while the shower is on!