Spray the dirty (glass) vase with Glassex, Allow it to rest for a minute then add water and let it rest for 10 minutes. The vase is crystal clear.
To clean vases of glass, I always put a little powder in the dishwasher, hot water and leave it there overnight. Success is guaranteed.
Scaling and algae in a glass flower vase can be easily removed by the glass surface "to polish" with the inside of a potato peel. Then just rinse and the vase is sparkling clean again.
You can easily remove deposits in flower vases by Steradent a tablet (or other denture cleanser) to dissolve in water in the vase and let stand overnight.
If youhave too deep of a vase for your (short) flowers, make of silver foil a prop, as much as necessary, push out there in the vase, then fill it with water and put your flowers, so they do not sink more downward.
Vase that is difficult to clean.
Put some piece of newspaper in the vase and shake it. Success guaranteed.
High vases are firmer when there is on the bottom a layer of sand or gravel.