are you using the original book that came with the machine?

Are you weighing dry ingredients or going by an actual measuring cup? I found weighing is a bit more accurate because flours can fluff up or pack down. Same with liquids using ml instead of a cup because if i was a smidge out it was a horrible loaf of bread.

Is the lid on 100%? one loaf mine was sitting crooked and the bread was heavy

Do you store your yeast in the freezer? mde a difference here for some reason

I'll add more if i think of it.