DELL XPS 15 will not wake from sleep

I have a Dell XPS 15 that I got this August (2019). I am having issues getting it to wake up after it hasn't been used for a while and goes to sleep. I can touch the mouse pad, or some keys on the keyboard and the keyboard lights will go on, but nothing comes back on the screen. I end up having to do a hard shutdown and restart the machine. Is there some key sequence to do to wake it from sleep?