How can I raed faster?

I'm always struggling with reading textbooks and scripts too slowly and I keep re-reading parts just to "remember them better". I have an intuition telling me that skimming too quickly over a text will cause me to remember nothing, even though it is a good method for abstraction because it makes me only focus on the relevant information. Constantly re-reading ends up being very inefficient and I lose too much time on long texts. How can I read faster?