Is it just me or does every paint marker go to shit I pick up. Doesn't matter what brand or what color. I'm 3/4 the way through scale tipping on a brown trout and all of sudden the pen doesn't want to function normal anymore. Shake, press down, paint begins to flow but wont flow all the way to the tip. The all of a sudden one big blob. I seem to fight and fight with these pens all the time! Ugh!.