I have a model X 90D with the higher amp charger installed. All of a sudden my X drops from charging at 72 amp down to 47 or 48 amps. I thought it might be something with my wall connector so I tried my wall connector at my other house and got the same result 47 or 48 amps. I have scheduled a ranger or service center visit for a week from now but I was wondering of there is something on the charge port that can be cleaned?