Hi it sounds like a little water damage
If you get some isopropyl alcohol and dip the thin end of a cotton bud in the alcohol ,while the device is turned off give the headphone jack and lightning port at clean to get rid of any corrosion or debris
And hopefully that will help
If it doesn’t give me a shout and we can go through more trouble shooting
Any questions please ask
Thanks
Have a great day:)
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