Is it possible to use dishwasher powder to wash dishes by hand?
Hmm, I'm sure you can but the powder won't wash right. You would have to use a high temperature for the water to do that. Then I wouldn't recomend Dishwasher powder for your dishes by hand. Use regular dish soap. That would be better then Dishwasher powder anyday.
You can, but you might not get very good results b/c the powder won't disolve properly unless you use a really high temperature to wash the dishes.