"It's the toilets on aircraft that get me, not emptied between flights because of turn round times, BA admitted this to me when I asked." Really, GingerMerkin? I work for an airline (one you might be familiar with
,) on the planes and certainly on long haul flights the cost of carrying around all that sewage outweighs the cost of just 'dropping' the loos considerably. Our waste tanks are always empty when we set off, and our water tanks almost always full - the exceptions being when we turnaround in places where the water is not considered safe to drink. On short haul flights it may well be that a loo is not dropped on a short turnaround at an outstation, but will always be dropped on arrival back at Heathrow or Gatwick. Our short haul flights are no longer than 4hrs at the very longest and carry a maximum of 250 passengers - so even without dropping the loo at an outstation that is still a lot less shit swilling round than on, say, an A380 flying to Singapore!
Wrt aircraft cabins - the public are their own worst enemies sometimes. Yes, a lot of people behave in fairly gross ways in the cabin (leaving things like used hankies and dirty nappies stuffed in seatback pockets,) and no, there is not enough time to give an aircraft a deep clean in a normal turnaround time. The cleaners do an excellent job though. If you see some of the aeroplanes I get off at the end of a flight you could be forgiven for thinking a week-long party had taken place - crisps and other food ground into the carpets, empty sweet wrappers everywhere (on the floor, wedged down the side of seats, in the seat pockets,) blankets and pillows thrown around, drinks spilt (both from turbulent flying conditions and by drunken passengers.) They have half an hour max to not only make the plane look like the kind of place people have just paid thousands of pounds to spend the next few hours, but they are also responsible for some of the security checks too. It's a crap job and I take my hat off to them.
What cleaners cannot do though is have an impact on the fact that an aircraft in cruise basically recycles much of it's air - it is far too complicated to explain why here, but basically the air is a completely different temperature and pressure outside of the aircraft to that which is compatible with being able to breathe it inside!
FWIW in the cockpit we are supplied with sanitary wipes to clean our headsets with (we have to share headsets - they cost a fortune!) and most of my colleagues and I give the parts of the plane we touch regularly a bit of a wipe too.
At the end of the day, good hand washing and not being gross are your best friends!