[Cob] please help my poor cob oven!!

[ninagrimmett]

i have built a cob oven after much research & book reading & thought i had the clay & sand to the instructions, it is all finished now, tho a few cracks in the surface, but from what i have read these are fixable, i have a clay,sand interior, followed two weeks later by a clay straw layer, again followed two weeks later by a clay sand bond crete(for waterproofing) layer, but we have had torrential rain here & despite all our efforts to keep the cob dry, it got soaked & the interior layer was so wet for ages & has started to fall down, i did start a small fire inside to try dry it out & stop the interior crumbling, but bits are still falling .... i was so looking forward to cooking in it soon & am so dissapointed, that all our hard work was in vein, any ideas?? i am new at this & thought all was going great, untill the rain came, any ideas, help, will be so greatly appreciated, i dont know if my oven will still be operable, with bits of the first layer of cob missing, it did dry out on the outside and started to on the inside when i had a small fire goin, but i was a bit worried about adding more fuel to the fire, but now more rain   thankyou for your time