Hi Kenneth,
It’s hard to answer this question without more details. If you submit a campaign analysis request I’ll be able to assist you better.
First, you need to see if it’s the link click CTR or the CTR (all) that’s at 6%. The link click CTR is more relevant for traffic campaigns.
Second, you should consider the conversion rate and LP CTR. I normally consider anything below 30% as a low landing page CTR, but many landers give me way more than that (60% – 75%). If the LP CTR or the conversion rate are too low, it may be an issue with the targeting or a matter of split-testing other offers.
Another factor is the placement that you’re using (it may be possible to use a cheaper one). Another one if the time the ad has been running, because ads that keep a good CTR for more days tend to lower the CPC over time.
That’s why a campaign analysis request would allow me to give you more precise advice.
William