If they are not hot, they might not be habaneros. There is a similar looking pepper called ajicito dulce. It looks just like a habanero, only without the heat. To add more heat, you can add store bouth hot sauces, powdered dried peppers, or even red pepper flakes. Hot sauce can be basic or flamboyant. Basic hot sauce is peppers, salt, and vinegar. The peppers are pureed with salt, left to steep, then vinegar is added, and it is strained. But, from there you can add garlic, fruit (purees and nectars), other spices, etc... You can also dry the pepper in a food dehydrator, then either leave them whole for later use, or process into powder using a spice grinder. Just be sure to keep that coffee/spice grinder just for hot stuff. Good luck.