I'll leave them for another few days and see how things come along hopefully they start to smell good at some stage
Yeah maintain the temp and humidity. Most people shoot for 7-10 days and stem snap.
The terpenes you got initially are easy to break down hydrocarbons they smell heaviest the first bit after harvest as the violotilize. As the dry continues, secondary compounds are formed within the plant and you will have the initial terpenes plus a new set from the noble rot at the end.
That being said I've had some Lemon OG that would always dry down and smell like paper..... stopped running that.