4yo constipation. Impaction treated weeks ago, but still won't remember to use toilet

[falstaff1980]

I've been following the advice here: https://eric.org.uk/childrens-bowels/parents-guide-to-disimpaction/, and my daughter has been on three sachets a day these past few weeks after we cleared the impaction, but is still only doing poo in the toilet/potty about once every two days, and the rest of time is still soiling her pullup (we got her potty trained 18 months ago, but have had to revert to pullups because of this constipation).

Pulling our hair out about what to do, she starts school in September, we have to have this sorted by then. I want to increase her to four sachets a day, but my wife thinks 3 is enough because we don't see any hard dry bits any more.

It's as if our daughter has lost the sensation of needing to go and so just has these accidents. For wee she is fine.

If she was constipated for a while then her bowel may have become a bit stretched, and it can take a while for things to settle down back to normal size so she feels the need to go every day.
I would try to work on getting a daily routine going, where you encourage her to go for a poo at the same time every day, whether she feels the urgency or not - we make it part of the bedtime routine.
Three sachets might be enough if everything is looking ok consistency wise!