Clean glass

A few times a year I clean all the glass in the house.

I put it all: vases, marbles, statues of glass, etc. etc. in the bath and put a few washing machine tablets between them.

We don't have a washing mashine, but I collect the tablets which are given for free in the shops.

I oour water over it all and stir the water when the tablets are dissolved.
I leave it there for about an hour.

Then let the water out.
Spray it with the shower with clean water and let it dry.

Additional effect: bath is clean without rubbing.
Not so nice: effect on environment.