What to use/do to clean windows inside properly?

[Bellballbune]

I’m so sick of smeared, marked, streaky interior side of my windows - despite my best effort to clean them.

please hit me up with your best products or tips

You don't need expensive products. A little washing up liquid in warm water is good. Spend the money on good quality microfibre cloths.

You need one to wash the window with, one to wipe off, and one to dry.

Wash with soapy water. Rinse with water and vinegar and then polish with newspaper, use a newspaper where the print come off in your hands preferably. couple of sheets scrunched up.

This ^^
Don’t waste your money on sprays.