I've just started using the Climara 100 patch, and am having a terrible time with it staying flat and in place. I can't really use the lower abdomen as a site, so I've been using my butt below the waistband on my panties. With normal activities, including sitting (and a little sliding) on the sofa, by the end of the day, the patch has shifted with prominent ripples or bulges present. Since the patch must remain flush and in contact with the skin in order to be effective, a solution has to be found, or I'm going to have to switch to sublingual pills. I'm currently experimenting with taping the edges. Does anyone have any ideas as to how I can resolve this problem? Any other placement spots? This patch is supposed to last 7 days. I usually wear cotton bikini panties. I'm wondering if I'd be better off with nylon.