A bit pricey but anyway: WASH for 5,50€ (8kg) or 7€ (13kg) or 11€ (18kg) and DRY for 3,50€/15min (18kg). Quiet large parking next to Centra where you can get gaz bottle for 28,99€ (11kg) and bigger. Not the smaller ones but check HERATY FUELS in town for the 6kg (campervan).