I teached my BB to start 食糊仔on her 4th-mth. She loves it very much. You should use the tea spoon, not table spoon (湯匙). You can buy the baby dinning tools for him. I bought a set of PigXX spoons (2 pcs), one for 食糊仔, another one for drink the juice. Very good to fit for BB's mouth!
My BB eats the plain 米糊 (without any favour), not 奶米糊 & I use her milk to make the 糊仔. I got the sample from Nestle recently and found the 糊仔好香 & better than Heinz'. You try to mix it less creamy & see any response. Which brand you're using now?