Sound like a good hair routine?
maybe make sure the cap is on securely and keep and room temp, nothing too cold or hot.
Well if they are really old the smell might fade or get funny.
try it out and see if it works! just be careful about how many products you put in your hairif you put too much it will be really greasy soonif you have really curly hair and want to straighten it all you really need to do is spray heat protectant when its damp, lightly dry it until dry, brush it out and use a flatironafter that just use a little smoothing cream and your done