There is no research that states such. Most online articles are referencing a study done on professional dishwashers, in which they complete their task within 2 minutes and some rinse aid was still found on the dishes.

Home dishwashers, the ones that take 4 hours on average, are not going to result in the same thing. Claiming such would be like claiming you won't use dish soap since technically it can still be left on your dishes when quickly washed.

> Home dishwashers, the ones that take 4 hours on average

I've never had one that took 4 hours. The most is about 2.5 hours.

There is absolutely no need for rinse aids if you already wash the utensils with water before putting the in the dishwasher. This is good practice.

I guess we have wildly different levels of risk tolerance. I even use an extra rinse cycle. You will understand only after have gastrointestinal trouble. Speaking of which, have you had a colonoscopy lately?