Linksys Wireless

I am using a linksys wireless router and have noticed a gradual slowdown of my internet and want to know if there is anything i can do to fix this.

Is there some sort of cache i can clear for just the router. So far I've tried clearing cookies, history, temp files, defrag, deleted some programs but it is still very slow and i have frequent loss of connection(not good with online games) and a very slow internet.

Any help or is it just going to stay this way?