u/Ok-Perception-7030

Hello. My husband and I bought our home in Sept 2025 and our backyard was left in disarray. The patio was already sectioned out but the patio pavers were never laid (as seen in the back of the picture). We finally decided we should lay them but we don’t really know how to properly clean them. We have power washed them and used Zep driveway and concrete cleaner on them but it didn’t work. Any suggestions??? TIA.