http://www.bowl4fun.com/ron/tip11.htmCheck out this article. This technique has become 1st adjustment when I start having carry issues. It took a little practice to know what each of the different hand positions would do to my ball reaction.
viewtopic.php?f=4&t=15879This is a link to the forum from when I had this same issue in 2012. There are some good comments from staff members on the techniques they use.