Although the bed mattress is only 5 years old, it has starting to sink in the middle. For a few months now, I have been waking up with severe backache so time to start looking around.
At the moment, there doesn't seem to be a good enough reason to invest in a new mattress just yet, so I have been looking around for a good quality mattress topper, preferably with memory or memory like foam, as the mattress has a layer of that on already.
Eventually, we chose one. It is quite expensive but you do get one month free trial. If you are not happy, it goes back with free delivery (which it also came by).
After a day, it had sucked back in its air and expanded to fit its cover. Although there looks to still be a slight crease in it, you can't feel it when lying down.
It had a dreadful smell as all new foam versions seem to and it does eventually 'air' away! It is known as 'off gassing' but apparently isn't toxic, just unpleasant.
I gave it 3 days to air then turned it over so the non-slip back was uppermost. It was then unzipped and this layer folded away from the foam. Another 2 days of airing got rid of the worst of it.
You can apparently also sprinkle it with bicarbonate of soda, leave for a few hours before hoovering it off with an upholstery attachment. Quite a lot of faff but so far, it is relatively comfortable to lay on.
Mind you, where ones bottom lays during the night, there is a dip there in the morning so everytime the bedding is changed, it will be turned to see if that helps.