DD is 2.6yo and pretty much dry in the day. However she withholds her poo, which leads to little bits coming out, which leads to me washing about 5-6 pairs of knickers a day, which leads to the smell of shit EVERYWHERE 
She's been prescribed Movicol, it barely touches the sides (one sachet). I'm considering giving her 2 sachets a day but that's only really treating the symptom, not the cause.
I'm so fucking SICK of scrubbing shitty knickers before they go in the wash. I'd love to be able to buy new every time but she would literally go through 7 pairs a day and I can't afford to throw £5-6 away every day.
She hates the nappy / pull up now but frankly I don't care. She's got no knickers left til they dry overnight anyway.
Please, please, please, does someone have any useful advice?