We use our Iced Tea Maker by Mr. Coffee!
But we used to make it by putting water in a glass gallon jar, about 4 family size tea bags (maybe more). Set it out in the sun for several hours.
When you bring it in while it is still very warm add sugar to taste. Sugar added to cold water will not dissolve.
DH likes it sweeter than I do so I make some separate for me.
I can't use Splenda as it makes me break out. So use the real thing.
Pour over ice and enjoy. Store rest in refrigerator.