How do you access/clean T@B 400 square bathroom fold down sink "cistern"?

subkron

Title kind of says it. I have a 2022 T@B 400 with the square fold down bathroom sink. The sink drains into a cistern/basin below it. To access the complete surface area of the cistern for cleaning is near impossible and that area gets as dirty or dirtier than the sink itself.  You can't get you hand behind it when the sink is down or beneath it when the sink is up.  It would be nice if the fold down portion could somehow be removed easily for cleaning but the pivot points seem to be integrated into the structure.  

Are there some special methods/tools people use to clean the cistern surface?

Denny16

You could try a good spray on surface cleaner to loosen any accumulation and rinse it out?  A small brush, similar to a toilet brush might fit in with the sink tilted part way up?  I eliminated the issue, by not having the sink to start with. 
 Cheers