Heat the milk in a heavy bottomed pan firstly.
When it start to boil, simmer the flame. Then add vinegar mixed with water or lemon juice slowly as you stir.
Once you see a clear whey that is greenish in color, switch off the flame.
Add the Ice cubes and mix well. You can also add ice water.
Take a metal strainer, lined with a cheese cloth/ muslin cloth (I used my dupatta). Pour the curdled milk in it.
Wash it well in the running water under the tap to remove the vinegar or lemon smell.
Squeeze the water gently or let the water drain naturally by hanging this chenna for 30 minutes.
I just slightly squeezed the excess water now and then very gently as my dupatta didn't drain the water by itself.
After ½ hour, take out the chenna in a bowl. It will be now more like a crumble look wise. But there will not be any excess water.
Now knead this for 5-7 minutes gently to make it like a soft and smooth dough.
Make smooth equal sized small balls. I made some 20 balls, you can adjust the number according to the size you want.