There is one problem with bringing so called "first world" concepts of hygiene to the so called "non first world'. The problem is that you build up no resistance to the normal local "bugs". When you finally catch something, which you will, it is not pretty.
By all means take all normal precautions, hand washing, rinsing/peeling of fruit/veg, all the preventative shots etc. But then relax and enjoy the local food, culture etc.
The "sanitation wipes" that I see for cleaning the handles on shopping carts at US supermarkets amuse me greatly.
As for cockroaches, the chances are that they will find their way onboard unless you are very lucky. Make up a paste of equal parts of Boric Acid/fine granulated sugar (what we call castor sugar) and make a paste with condensed milk. Form into small bricks (about 1in in diameter) and dry in the sun. Place one in the corner of very locker. They last about a year and roaches love them. Works a treat. If the Skipper continues to whine feed him one with his morning tea.
