What should I do if I find that this dye solution produces precipitation? How can I tell if the dye has failed?

What should I do if I find that this dye solution produces precipitation? How can I tell if the dye has failed?

If a blue precipitate is found in the dye solution before the experiment, filter it with filter paper before using it. Whether the dye solution has failed or not needs to be judged according to the dyeing result.