We have a sofa bed that is almost 1 year old. Our issue is not with making it more comfortable to sleep on. We find it very uncomfortable to sit on for extended periods of time which is unfortunate because it's our only sofa. It seems like when we sit down the bed component becomes more compressed so it's no longer level with the frame around it. It's also causing the seat cushions to constantly slide and their shape is becoming distorted. Any ideas on how to fix this and make it more comfortable? Thanks in advance!