When the chemical in the asphalt of your roof shingles reacts with the anodized aluminum of your gutters this can cause staining on the side of the gutters that some folks not so lovingly refer to as zebra stripes. This is most definitely something we can take care of for you! We use a biodegradable solution called Gutter Butter to help remove them. Schedule your no-cost estimate for our Gutter Cleaning in Alamo Heights TX service to see if this would be a good option for you.