I have seen this too.
If it is spice you could try to redissolve it by warming. Another option is to try getting it out by pouring through a metal tea strainer or fine sieve or similar (I used a tea strainer, I think the smaller size is probably easier).
If you get it out by pouring through a sieve it will be dirty. I cleaned it by initially putting into a glass of cold water then decanting, this can be followed up by a re-x or 2.