Ignoring or deleting lines starting with # using dlmread.

I have a file that contains a couple of 1000 lines of data with a few lines inbetween that are causing dlmread to crash. It looks something like this: 1 2 3 4 5; 1 2 3 4 5; 1 2 3 4 5; ## text; 1 2 3 4 5; ...

Every line that I do not need starts with ##. I just want dlmread to skip those lines or maybe write a procedure that deletes these lines in my txt file. I just need th3 numeric content of my .txt file.

Thank you in advance!