Contaminated Pads?

I've just noticed that my front disc is now catching on the pad, and makes a metalic scraping sound as it does so, different to how it normally sounds when rubbing.
Also recently i bled my front shimano deore hydro brake and not re-tightening the bleed nipple properly got mineral juice all over the brake [and also more than likely on the pads too.]
In short, does this sound like new pads are required? Or is it another problem all together?
Cheers in advance for the help folks.
Also recently i bled my front shimano deore hydro brake and not re-tightening the bleed nipple properly got mineral juice all over the brake [and also more than likely on the pads too.]
In short, does this sound like new pads are required? Or is it another problem all together?

Cheers in advance for the help folks.
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sounds like it could just be muck stuck on the pad/in the caliper.
Parktools :?:SheldonBrown
Yea the breaks still seem to perform as usual.
Would you recomend washing the pads calliper then?
Parktools :?:SheldonBrown
Thanks for the help.