Questions about pumping at work/on the go! How to keep parts clean?

Hi! I am going back to work Monday after a 16 week maternity leave (I’m in the US). I have been exclusively breastfeeding and will be pumping at work to provide breastmilk for my baby girl at daycare.

I DO have a freezer stash That I will pull from for Monday’s milk, but I will be using the milk pumped the day before (Monday’s pumped milk will go with her to daycare on Tuesday, etc...).

I have a portable cooler/tiny fridge that plugs into a wall outlet or your car outlet so keeping milk cold is taken care of. The only thing I am worried about is how I’m going to keep my pump parts clean throughout the day.

I am a sales rep so I am only in an office setting twice a week on Mondays and Wednesday’s (typically half day in the office, half in the field). So I won’t have access to a break room sink to wash pump parts most days. I will mostly be in my vehicle traveling to appointments and meetings.

Does anyone have experience pumping while working in this setting? What’s the best way to clean and/or store pump parts? I’m hoping to only pump 3 times each work day if I produce enough at each pump session. Any advice or experience is helpful!!