I have found that my favorite way of steeping is to use hot water (110 degrees, just what my tap puts out) and let it sit for 1/2 an hour. I have tried the week long steeping and didnt see much of a result except the throat hit (TH )was alot stronger (if that what you like, go for it). I prefer no TH which is why I use all VG. The flavor does become stronger after I steep in hot water, But in all honesty I didn't notice a big difference if I steeped or not. I accidenatlly left the cap off one bottle of sour apple for 2 weeks and the TH was really strong and I wasn't real happy with it. BUt since it seems so many people like the TH, Time seems to be the answer. For just flavor, The hot water worked for me.
Smokeater116