I dropped from 700 elo down to 600 elo and it keeps on declining

It is completely normal to experience 100 point swings in ratings.

I'm glad you shared that, Bethsaida; because I had a blitz rating of over 1,000 (I've been a member here for over 6 years, and the 1,000 rating is not a beginning rate that's given when one opens an account -- I worked my way up to that rating). After being a year or two away from the site (as I played other strategy games on other sites), I came back a year or so -- and then my 1,000 rating started dropping. It's not only because I've been blundering a lot (because I've gotten used to not looking at the entire board when I make a move) BUT ALSO my dysfunctional mouse would move pieces to wrong squares all the time. Nonetheless, (at this moment) it's now below 600. But I feel a lot better now that I've read your post because now I don't feel so alone!