You may well need to empty the toilet cassette before your holiday is over.
The procedure is
1) Don't let the cassette become too full
2) At emptying time clean the bowl and ensure that the blade is fully retracted to remove any liquid residue and then fully home to form a tight seal.
3) Open the emptying hatch, lift the yellow catch and withdraw the cassete
4) Empty the cassette after removing the filling cap and by holding down the pressure release button
5) Wash the cassette with water, when thoroughly clean and hygenic add approx 1 litre of water to the cassette and replace filling cap.
6) Add 1 filling cap full of toilet chemical to the water in the cassette
7) Ensure that everything is clean and dry, slide the cassette back into the hatch and close and lock the cassette hatch doo
8) Re-commence using the toilet as normal.
End of - that's all that you need to know...........
I think that this forum has had enough of lavatorial matters for the time being, let's move on now and discuss something else please.