"I really wouldn't recommend washing as this would damage the waterproof properties but if you really feel that you must wash them, use warm water and soap (NOT detergent). After washing, they will need to be reproofed using either Granger's or Barbour's reproofing wax ( or we sell it online). To reproof, the bags must be completely dry and free from surface dirt. Warm the tin to soften the wax then apply to the bags using a clean, dry cloth (put extra on the seams). Finally, blow with a hot air gun or hairdryer and this will make the wax melt into the fabric. You will probably need 1 x 50ml tin of wax per pannier.
AFAIK, not supposed to put any sort of wax on a carradice as it can stop the fibres from expanding when wet (this is how they stay waterproof).
actually - http://www.carradice.co.uk/index.php?page_id=accessories
and - from another forum
"I really wouldn't recommend washing as this would damage the waterproof properties but if you really feel that you must wash them, use warm water and soap (NOT detergent). After washing, they will need to be reproofed using either Granger's or Barbour's reproofing wax ( or we sell it online). To reproof, the bags must be completely dry and free from surface dirt. Warm the tin to soften the wax then apply to the bags using a clean, dry cloth (put extra on the seams). Finally, blow with a hot air gun or hairdryer and this will make the wax melt into the fabric. You will probably need 1 x 50ml tin of wax per pannier.
Kind regards
Margaret
Carradice of Nelson Ltd"