@Lubird
My LO is only 15 months so haven't quite got to this stage yet, but I've always found tots bots bamboozle stretch only last about 2hrs before being soaked. I imagine at 22 months (and given they've worked so well till now) you're probably a bit reluctant to buy a completely new stash though so maybe adding to the bamboozle is the answer?
If she's doing 'power wees' as @confusinglady describes is it possible to add a microfibre / zorb booster inside bamboo nappy so this can absorb wee quickly and then bamboo has chance to soak up slower but to higher capacity (iyswim)? Personally I have never got on with microfibre as get compression leaks so I'd go with the zorb, but other people seem to use microfibre loads so could work for your LO.
Could also try laying a hemp booster between nappy and wrap as extra absorbancy but might start getting bulky then?
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