'Dried up' touch up pen

[kingstondc5]

Hello all,

Brief summary, got a touch up pen that ive never really used nor have done in a while (so i know theres paint in there), but however, when i went to use it recently, very little paint/fluid came out on the brush.

Is there anything i can put in to bring it back to life or is it fooked and a new one required?

Thanks