Hi guys, I've took on a job for next week for a commercial takeaway shop and it's the first time ive came across promotional posters/stickers on the outside of the glass as a pose to the inside. Is there any specific way to get around this or has anyone came across this problem before? I don't see why my squeegee wont go over it but I'm just concerned about how much water will drip to the cills. Any advice highly appreciated ?