Crytalized DEF fluid leaking out of the reservoir cap on my beautiful(01)

Crytalized DEF fluid leaking out of the reservoir cap on my beautiful(01)

Image gallery: Def Leaking

2020 L5P Def leak Diesel Place Crytalized DEF fluid leaking out of the reservoir cap on my beautiful Replace Leaking DEF Filter on Freightliner Cascadia Detroit Diesel DD15