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Cranky
Had a panic with my rs685s, after the recent deluge my front calipers pistons got very sticky and then seized yesterday. A few accounts on the interwebz said when shimano pistons seize the caliper needs to be replaced.
I also found a few people suggesting to carefully pump the pistons outward and to wipe them clean with isopropyl alcohol. Then whilst the piston is out to wipe the sides with mineral oil and then push them back in. I tried this last night but it did not seem to make any difference. So I ordered a replacement caliper.
Repeated the process this morning and hey presto, pistons are retracting nicely and I have working brakes again. It probably means I ought to clean the rear ones before I get the same problem. Now I just need to go in to Evans and tell them I wish to cancel the order.