removing thedoor seal on my samsung B1415J washing machine?

i have cleaned the seal on my washing machine numerous times and my washing is still getting dirty marks on it. so i looked again at the seal and was able to see the gap between the metal drum and seal and got my finger in and it came out well dirty! so i want to get behind the seal to clean it – how can i get behind it? or help on how to remove the seal to clean it etc? cheers