How to fix rejection rate ckb

I have 2ck6 on dx pool and getting high rection rates 4-7% what can I do to lower them I’ve tried poolin and f2pool and been getting around the same also the Ethernet cables are connected to a WiFi extender instead of main router since there in my basement would that have anything to do with it? Want to try 2miners but every time I put in url and wallet adress it doesn’t pick up pool and shovel doesn’t turn green not sure if I’m suppose to use a certain wallet or not but I’ve been trying with my poolin wallet if anyone has any advice I would greatly appreciate it

i get a higher rejection rate on my ck6 also. It depends on the day though for me