I have a cloth top air bed that has a slow leak..?

i bought a queen size airbed about 2 months ago and my husband and i are currently sleeping on it. the problem is about 1 week ago the bed started to deflate and we have to get up and reair it up after about every2 to 3 hours. it seems to me this is getting worse every night with less and less time before i have to air it up again. i have tried soap and water and baby powder. my bathroom is too small and my airbed is cloth on top and sides like i stated before so i can not submerge it in my bathtub which if anyone has ever tried it is extremely difficult. n-e ways i foud a great idea where someone posted to put a little water and soap on the inside air it up put it on a sheet and lay on it the repeat on other side...air will push water from small hole...sounds perfect would probably work..only problem is...i have a built in electric pump in my airbed......what can i or what should i do??? any help will be greatly appreciated.