This is a mess my last smoker, an upright, left for me a couple of years ago. I'm not sure if this is grease or rust stains. I think grease would normally be black, so I'm leaning towards this being rust. Any thoughts on cleaning it? I think I'm going to try bleach first, then TSP. I tried a pressure washer with some concrete cleaning additives, but the stain didn't even lighten. I might have actually tried bleach at some point.
I've read that TSP is bad for plants. If I clean this with TSP, should I just saturate my yard around the porch with water both before and after cleaning? I'm sure bleach isn't great for the lawn either, but I suspect it isn't as bad as TSP.
I've read that TSP is bad for plants. If I clean this with TSP, should I just saturate my yard around the porch with water both before and after cleaning? I'm sure bleach isn't great for the lawn either, but I suspect it isn't as bad as TSP.