1. Collect Radioactive Blue Potion to brew Radioactive Blue Cheese
Adventure: Collect Radioactive Blue Potions and Brew Some Cheese
There is no special strategy here. Simply equip your best equipment and any standard cheese to catch the mice for the Radioactive Blue Potion loot. Collect this potion as many as you can since you will need it not just in Laboratory but in the next area as well, which is Mousoleum.
You can brew the Radioactive Blue Cheese using the potions you collect in the Inventory > Potions page.
2. Catch Monster Mouse using Radioactive Blue Cheese
Adventure: Catch the Powerful Monster Mouse and get the Map to the Mousoleum
Catching the Monster Mouse also nets you Tattered Mousoleum Map Piece which unlocks Mousoleum accessible only from Master and above.
You can continue your journey: Mousoleum Guide
You might already notice that everytime your Radioactive Blue Cheese goes stale, it becomes Radioactive Sludge.
You need to have 20 of this sludge to craft a certain Tactical trap later in Great Gnarled Tree later. So better stock up now. For details, go to Great Gnarled Tree Guide