Hello

Has she said why she doesn't want to wash? 

My mum has advanced lung cancer in both lungs and 3 brain tumours.

She hasnt been able to get upstairs for about a month now. So it's been a strip wash downstairs every other day with help from me. Maybe this could be a way for your mum to wash. Encourage her to wash herself but reminder her you're there to give a hand.

Maybe try different soaps and smells to make it more relaxing?

Sometimes my mum doesn't feel like washing her full body. We literally do head to toe. So if she doesnt feel up to it we just do under arms, under breasts and between her legs. 

Hope this helps x