
annafdd
- June 29th, 20:12
I have been reading up on the not rinsing thing. Lots of people, usually British, only in one case kiwi, vehemently say it's not a British habit. Lots of people, uniformly British, will tell you that rinsing is not necessary, wastes water, and dishes won't dry properly, and besides, nobody ever died of poisoning from leftover suds.
I am more and more amazed.
I am not fastidious. I live in a house that is mostly gross. I have a healthy respect for exposure to some bacteria.
But I does seem to me that people haven't fully grasped the principles of washing.
Washing means removing potentially harmful substances from stuff. When it's something you eat from, you mostly want to remove old food stuff, because old food stuff is organic, and bacteria can grow on it, and having bacteria grow on the things you eat off from or with can be dangerous.
Mostly it isn't. As I said, I am gross and unclean and I'm still here, with a very robust immune system and no obvious health problems.
But, you know, it can happen. I suppose that when you live in a place where the summers are really, really hot - and I mean temperatures up to 40 C, that never drop under 30 even at night, you are sort of naturally selected for fastidiousness about ripe stuff coming into contact with your mouth. It won't kill you, mostly, but it can certainly be pretty unpleasant.
So, removing foodstuff from dishes and cutlery and glasses. To do that, you need to lift the particles, and then dispose of them. If it's stuff that dissolves in water, like sugar, that's easy: easier if the water is hot, because even stuff that is water-soluble will not dissolve in cold water, but will dissolve in hot water. Try putting a teaspoonful of sugar in a glass of cold water and one in a glass of hot water and notice the difference.
The problem is that a lot of the stuff we eat is fats, and fats are not soluble in water. What to do then? you can scrape them away, but fats are sneaky and will leave behind a thin veil of grease that you can't see, you can just about feel, but can still happily act as a petri dish.
In comes soap. Soap is basically what is called an amphiphile, that is, a compound that has both hydrophilic and a lipophilic properties, that is, can bond both with water and with fats. It's usually a long molecule with water-philic bits at one end and fat-philic bits at the other.
What it does is bind to the fats, bind to the water, and carry the fats away with the water.
This is where rinsing comes in. Soaps are, in fact, generally mildly antibacterial, but that won't be much use to you if the medium where bacteria can grow is left behind on your dish. So when you dunk your dishes in hot soapy water what you do is kill off some of the bacteria with heat, dissolve the water-soluble parts of the grime, and send lipophilic molecule out looking for fats.
You then scrape the dishes. This mechanical action is probably the most important act of cleaning. Putting a dish in hot soapy water and taking it out again won't clean much. Scraping lifts the food particles, and allows the soap to grab the foodstuff and take it into the water.
The water at this point becomes a sort of primordial soup, a happy growth medium full of fats, sugars, soap, and lovingly reaching the perfect temperature for bacteria cultivation.
A film of this perfect growth medium remains on you dishes when you lift them out of this primordial soup and put them on the rack.
If you instead put the dish under clean hot running water, the whole foodstuff slides off, sugars in solutions, fats bound to amphiphils, and big blobs of matter floating away.
So the problem with not rinsing is not the suds: it's that you are not carrying away all that matter that you went to such effort to scrape away. It is true that a lot of people can taste the suds on the dishes, and it is also true that some washing-up soaps can cause diarrhoea, but for most people, this won't be a huge problem. But, you're not really cleaning the dishes. I mean, would you really dip your dishes in a tub of washing up water, full of floating bits of congealed fat and various other detritus before eating?
As for wasting a lot of water, you don't really have to if you use hot water. And if you use the two-sinks, or sink and tub, method: tub or sink full of all your dirty stuff, hot water, and some soap, wash wash wash, pile dishes in other sink, then rinse rinse rinse. The water dropping off the piece you are rinsing will take care of carrying away most of the suds and grime, and you'll only need to do a quick rinse to get the rest off.
Yes, you use more water than the no-rinse method, but when it comes down to it, you are wasting more water with taking a totally unnecessary shower every morning (instead of washing in bits which is what we do in our parts, but then we do have bidets for this), and you waste way more electricity by boiling a full kettle instead of just the amount you need.
Plus, less food poisoning all around.
I know, I'm obsessed. It's one of the very, very few British customs that I find faintly disturbing instead of delightful or quaint.