Felix Magath's side remain rock bottom - five points adrift of 17th-placed West Brom - with just six games of the campaign remaining.
Former Chelsea and Aston Villa man Sidwell has continued to give his all, despite picking up a few niggling injuries, and is the Cottagers' top scorer with six league goals.
The 31-year-old is not giving up hope of survival and is backing the Londoners to produce a run reminiscent of their 2008 escapades.
Sidwell told Mirror Sport: "There have been a lot of bruises and injections. But it doesn't compare to the feeling of potentially waking up with an 'R' for relegation next to your name.
"There are six games to go and by hook or by crook, I want to win them. It doesn't matter how, we have to do whatever it takes."