LAVDUMPER
With a name like LAVDUMPER I would have thought you would know the main problem. Muslims use a different type of toilet (stand up - hole on the ground versions !), which is why they tend to have a slight problem with standard aircraft lavs. To make matters worse, their religion does not allow them to use toilet paper. And that's all I will say about that !
Many aircraft are ready for a total refurb after the hajj season.
One of the other problems can be ground handling at JED.
You are promised a 1-2 hour turnround, and it ends up taking 6 hours.
I guess it can’t be easy to match up millions of pilgrims with their aircraft, especially when almost all of them share similar names like Mohammed, Abdullah etc.