Daryl, you are probably right. I usually use cold water anyway. Maybe dissolve salt in hot water first, then add to the cold water. Pour dry salt onto blood stains if somewhere needed, like on a white shirt.

if the blood has dried, it may create a permanent stain. Same with red wine. Salt is wonderful if it is still damp.

For cloth for carrying meat, some stains are not a big deal. If the cloth is clean and hygienic for the next use of it.