Your chia seed jam might seem too runny and thin for a couple reasons. First, it could be that you have added too much water. Be sure to follow my measurements exactly as labeled in this post. Additionally, you may just need to give the jam more time to thicken. The chia seeds will become more gelatinous as they absorb liquid, helping to thicken up the jam. Lastly, you can mash your berries more if they are still on the chunkier side.