neondon,
It's easy to add tension to the springs. You will need a ladder and a helper, screw gun with appropriate bits. Just did this 2 days ago.
There are several YouTube videos out on replacing the awning springs so I used those as info to learn how the system works. All brands have different ways to adjust and my Carefree of Colorado 'Spirit' uses 2 screws to keep the spring tension. Basically, locate the pin or screws that keep the spring tension , while grasping the outer bracket with vice grips...remove the pins or screws. You will feel the spring tension now on the vice grips that you have a firm grip on. Just add a couple of winds then put the screws back in place. Put the awning arm and bracket back on and test it out. It helps to have someone hold the awning from retracting while you do your thing, thus the helper..