Stinky Nappies

Morning!
Hoping some of you long time users can offer some advice! I have recently started using cloth nappies - a bit of a mixture but mostly pockets that my clever mum made (and are very cute I must say!) I am stuffing these with cloth flats and they are doing the job just fine have had no leaks whatso-ever even overnight etc.

My question is or my problem rather - they get a bit stinky at times! They are always clean and resh smelling after a wash but once DD does a wee they smell rather strongly... I never have this problem with disposables so wondering if this is a normal thing, if theres anything I can do to prevent the odour or has my DD just got stinky pee?? I also have stuffed using bamboo and hemp and they still get the weewee stinky smell... not a major but that is my only peeve about cloth use so far :)

I found that happened when there was washing powder build up and the urine seemed to react with the washing powder and make them smell awful.

Easily fixed with a strip wash:

Hot wash with 1/2 cup of vinegar

Rinse with 1/2 cup of baking soda

Another rinse after that.

Should fix the prob for a while. It did for me anyway

(I started washing on hot at least once every few weeks as a preventative measure as I found that build up was more likely to occur with cold washes. Just my opinion though)

White vinegar yes. And no washing powder.

Hey ladies thanks for the tips :)

Just wondering would soaking the nppies in napisan make the build-up build up faster and require stripping more often??