The trick is to 'buy now' whenever the hourly limited slots open up, as all available slots are usually taken up within the first 30s.

Good news is that you can now place a maximum order for 4 bottles instead of 2, since they've increased production.

The trick to secure your sambal is by choosing 'buy now' immediately when the hourly (limited) slots open up instead of adding it to cart first.

Since you only have a small window time frame to secure your order (they're usually sold out within the first 30 secs), you'll need to be quick from the time you first tap 'buy now' to adding the quantity you want (max 4 per order) and placing the order.

I never failed to order mine via this method but almost never succeeded by adding it to cart first.