Please suggest washing machine.

[Walter]

how does one know that he used enough detergent, if he does not have the bullae to guide him?

By trial and error ... different brands have their own mixture ... using 20 ml per kilo of clothes ... then you adjust to 25-30 ml / kilo for clothes that are worn going out of house ... usually more for school clothes ... but school's out already ...

If you put too much detergent, it will not clean clothes well ...

Then there's fabric conditioners ... ever wonder why your bath towels don't seem to absorb water? ... fabric conditioners coat fabrics with a film that makes it "shiny" thereby making it less absorbent ... besides, they're not healthy ...

Bubbles ... original soap / shampoos did not produce that much bubbles ... But then marketing department wanted it because consumers were gullible enough to believe that more bubbles = better cleaning ... so they added bubbles chemically ... Remember, J&J's no more tears shampoo? ... they simply removed the bubbly chemical and charged more ...