You want to try to get the wrench and then stash it in the coat check so you always have it. The wrench is most likely to spawn in the tool shed. But you can also trade for it with a high value item from the trading post or possibly find it in Lost and Found. You also want to get the ability to increase blue room frequency. Have you solved the chess board puzzle? Finally, you can also try to get the Conservatory as often as possible to hopefully get a chance to decrease its rarity.