Options on how to wash this building?

How would you guys go about cleaning this? Strong house wash? Xjet? Building owner mainly wants the black streaks removed. Thanks in advance.

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Roof mix.

Rinse with agitation.

Up close and personal with high volume low pressure.

The discoloration is located where it is due to faulty wall cap termination and is likely to return sooner rather than later.

Plus hot water if ya have it.

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Thanks! I’ll be doing it Sunday and Tim I appreciate you taking my phone call yesterday!

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