Testing on arms

My fingers are getting a bit tired lately so I’ve been trying to test on my arms but I can’t seem to get enough blood. Over the last 2 days, I’ve probably poked my arms at least 15 times and got 2 large enough blood drops. I just end up poking a finger in the end.
Do others have the same problem? Any tips for getting more blood?
I would love to be able to use my arms occasionally, especially now that its getting cold out, but I can’t seem to have a successful test. I use the clear lancet cap and put a fresh lancet at the deepest setting.