Agree.
One time I had one that did something similar, starting bleeding like mad (I got blood everywhere - I'm glad my downstairs has a laminated floor), I took it straight off, and rang Abbott, explained it to them (including gory detail about the blood
) and they sent a replacement out for me.
Note: I actually had a humungous bruise that lasted for about 2 months, hurt like stink for a good week or so) - it's only happened once, don't know whether it was a faulty applicator or what.