Got a shock last night.... Was cleaning Hideji's teeth with dental wipe and it was gone in a instant! While chewing, he had swallowed the sheet down and when I had realised it and tried to retrieve, it was too late! It was late in the night and of course the vet was closed, we were fanatically searching for information on the internet on any similar cases.
Honestly, there was nothing we could do beside monitoring Hideji (he seemed fine, oblivious of our worried faces and was wondering why there was no gum treat after teeth cleanup. He usually gets one after his teeth was done.)
S took few hours off to bring him to the vet the next morning, we were hoping that it would pass out in his stool but there was no sign of wipe. Vet made Hideji drank medication for him to puke out but only his morning breakfast was found. (Nowadays Hideji can recognise the pet clinic and there's nothing good when he comes... He has a tendency to start shivering while we are waiting for our turn).
So far we still have to continue monitoring his stool and hopefully it will be out tomorrow.
Updated post on 11 Jan 2018 - Sigh of relief as the dental wipe came out in his stool in the morning. According to S (since he was the one who took him out), appeared to be like chewing gum crumbled together.