I use Boeshield T-9 every 100 miles usually, more if I'm caught in the rain or have been riding dusty trails. My routine is to clean the chain with a Park Chain Cleaner using a degreaser first. Then I run the chain once or twice through the Park using water and a few drops of dish detergent. I dry the chain with a clean rag and then use a heat gun while turning the pedals backwards to complete the drying. I apply a drop of Boeshield to each pivot point on the FD and RD and the cable rub points under the bottom bracket . I apply a drop to to each pin and then let it set a couple of hours or overnight. I run the chain through a dry rag and I'm good to go.

It has improved my chain life and shifting is solid and quiet. I like it.