I have come to realise that hypo(JIK) no longer has much effect on my whites no matter the quantity I use or the time I soak them in it. I also read in an article where the usage of lime with hot water can make them whiter. I tried that technique but to no avail. Please does anyone has a better solution because white shirts are my favourites and I love to maintain them. How can I improve their brightness and whitten them more. Someone else may learn from this also so I need advice. @Lalasticlala please this may educate people out there who are also in state of confusion like me. Please help push to fp. Thanks