Wondering if someone can assist with a low gas pressure problem please. I'm currently touring in Europe with a new german made van. I have 1x 11kg refillable Gaslow bottle and 1x 11kg german exchange bottle (not joined). I had the Gaslow system installed in June in the UK before leaving. All worked fine with the Gaslow System for the first 6 weeks. When it was empty I refilled the Gaslow bottle in Spain and all as fine for the next week before we noticed the flame on the burners was very low on all rings (or on one ring if only one lit). Tried turning off the bottle, unscrewing the regulator etc. but with no success. Then put the regulator back on the german bottle and it works normally. Since then have tried a few times to swap back to the Gaslow bottle but it either has the same problem or last a minute or so normally before reducing to a low flame. The gaslow bottle shows about 2/3 full wich is about right considering the refill and time used since then. I should add there is no filter on either bottle. Could this be the problem? Any ideas greatly appreciated.