Here's a stupid question. I was trying to transplant a little bell pepper seedling into a bigger pot, and I accidentally contaminated my potting soil with soap. By the time I realized that I had forgotten to rinse the soapy water off my shower stall floor, I had already poured the dirt out onto it. It got so soapy that when I watered the dirt, soap bubbles burbled up.

I put the dirt in a sieve and rinsed it under the garden hose for a good 10 minutes. I think I got most of the soap out, but not all. Is the dirt now unusable, or is there some way to rescue it?