Chrysler 300 limited intermittent starting

I live in illinois and this car handled the
snow perfectly and cranked right up in the
negative degree weather we had. Heres my
problem- just last month when the weather
started to get into the 50s one day i went
out to leave and the car didnt want to start, i
heard clicking under the hood and all the
lights came on along with the radio. Later
that night my dad and i checked the fuses
and battery and there werent any issues and
it started right up!

then it happened again and again. So we
took it into a shop and they checked codes
and they found nothing and it started up
every single time for them. Of couse. Once i
got it home it ran good. Its 4 weeks later
and im having the same issues again.

My father who works on cars is stuck what
it could be and i have looked online for
answers but ive come across so many
possibilities ive heard it could be ignition,
starter, fuses, battery, even the key?
So im turning to you guys since you all own
these lovely cars to see if any of you have
had this issue? have you fixed it? If not any
ideas?