Watch crystals are made to run at very low power. You may be damaging your crystals. You _must_ have a high value resistor between the output of the oscillator and the crystal/cap. This resistor is typically 300k to 1meg ohm.
The old RCA data book I have attached shows has how to calculate the correct value. See page 57 in the data book for crystal oscillators.
Microchip does not mention it.
http://ww1.microchip.com/downloads/en/AppNotes/01288A.pdf