Do you cook your pasta in a large pot, with plenty of boiling water, and a good amount of salt? Usually I just stir once just after putting the pasta in, and I never have noodles sticking together.

My pot would have to be 3x its size to fit the amount of water a single package of pasta says I should use.
1kg to 10l
Do you have a bathtub in your stove?

1 kg of dry pasta is enough for 10 people! Do you often cook for that many people? (Genuine question)