6.9% reject? Is that an indirect pool fee?
high reject percentage can depend from "fast money" mined (too low difficulty) and/or from the fact their us server is far away from your location.
About location, we are all waiting for
eu and asia server that should come in the following hours; about fast money, we cannot do anything due to the fact some fast money are normally mined with an high reject rate due to the low difficulty. In this case for low difficult fast money, you can try to add --expiry 1 --scan-time 1 --queue 0 to your cgminer options to see if reject rate can be lowered a bit.
Just evaluate if clevermining high profitability (normally higher then other scrypt multipools) compensate the high reject rate (normally at 5-6% on a 24 hours basis).
Just an example...if clevermining pays you
0,012 for 1 Megahash/s and you are losing 5% for 24h reject rate, you will gain 0,00114
If
0,0114 is a good profitability for your rig, compared to other multipools, you can tolerate this 5% reject rate.
