Nozzle replacement? How often

I have a mini since 2017. Been amazing out of the box but of late I have been getting a few jams and most prints seem to fail. It doesn’t like prints that have any fine detail when it has never been a problem in the past. Filament is brand new pla. Tried various temps. Ideas? Filament seems to curl around when coming out of nozzle.

I also have a mini since 2015.
I would first try running some filament cleaner through to see if that helps. I mainly run abs through the original print head and in switching filaments I usually have residue that jams it. Cleaning helps. But I also ordered a new print head to see how that works as well so depending on your needs that may be something to think about.