Electric bill ridiculously high - what could it be ?

I am with scottish power and my electric wit them seems to increase more and more with every bill , they are saying i have to pay £65 a month and that just electric not gas
i cant think of anything in my home that would increase my bill so much , ( iwas only being charged £30 a month about six months ago )
i have a laptop which uses a mains charger , i use a dryer every now and then when it is raining outside but always have done ,
does anyone know of any other high usage appliances it could eb or is it simply scottish power over charging me, or a fault on the meter
i am changing suppliers asap