How do I know what temperature to set my Easypress at?

This will vary from material to material. Your EasyPress comes with a chart that tells you the exact time and temperature for your surface material and the type of iron-on vinyl you’re using. For your convenience, we also have some handy EasyPress charts in our Cricut Reference Guide, free with your Makers Gonna Learn membership. Here is a comprehensive guide to Cricut EasyPress that you may find helpful: https://makersgonnalearn.com/comprehensive-guide-to-cricut-easypress/