Does anyone have any recommendations on parts that are more than 5 years 
old for getting them to solder.  You can see that parts reflow around the lead, 
but when you take the part off of the pads there is no solder on the bottom 
of the lead.  These parts fail test, but then we add stronger flux and use hot 
air to re reflow and the part passes.  The leads are not bent, they are flush to 
the board.  We changed solder paste, which did help some, but not 
completely.  I would like to use the parts without having to send them out to 
get the leads tinned before placement.  These parts are obsolete so they are 
hard to find parts.  Any recommendations?  Thanks for your input.

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