I've tried to feed Leo with long wooden tongs twice lately and initially he hisses. I've just kept them there until he calms down and realizes there's a moving cricket at the end of the wooden tongs. Once he calms down he tries to get the cricket from the tongs, but I think I'm doing something wrong because the cricket falls each time. I think I'm waiting too long (or not long enough) to let go with the tongs. Any advice on how to properly feed him with the wooden tongs?