Make Your Own: Yogurt!

One of my friends makes her own yogurt----I know, what!? I wrote to her on facebook the other day, to ask if she owned a yogurt machine, but one of my other friends replied with a link to this recipe and I decided to try it:

Notes: This recipe uses a 2 quart crock. In using a 4 or 4 1/2 quart crock I found the yogurt to have a bit of a "springy" texture. I was able to alleviate this by heating the milk an additional 15 minutes for a total of 2 hours and 45 minutes.

• Turn your crock pot to low and pour in 1/2 gallon of milk.
• Heat on low for 2 hours and 30 minutes.
• Once 2 hours and 30 minutes have elapsed turn your crock pot off and unplug it. Let the milk cool in the crock with the lid on for 3 hours.
• After 3 hours remove 1-2 cups of the warmed milk and place in a bowl. To that add 1/2 cup of yogurt with live active cultures and mix very well.
• Pour the yogurt-milk mixture back into the milk and whisk thoroughly.
• Place the cover back on the crock and wrap the entire crock pot in a thick bath towel or two.
• Let it culture overnight, 8-12 hours.
• In the morning stir yogurt (if desired) and store in glass quart jars or a container of your choice.
• For optimum texture, refrigerate for at least 8 hours before using.

Okay. I heated the milk for a bit longer and mine is downright runny. Did I do something wrong? 

I ate some with chopped up strawberries, but it really wasn't what I was expecting..so yogurt makers, let me know, did I mess up!?