Last Hidden Achievements

[Tripa/Flaffy]

Up to this point I have looked around on the discussions and guides for some way to get all of the achievements, however I'm still missing three. The Hot 100, Somebody Else's Problem and Your Neck Will Go On. If you know how to get any of these I would like to have at least a hint for solving each one.

[Abiogenetic Sponge]

Hot 100: Has to do with the uncursing of the pocket watch, when you're a dino.
Hint 1: You need to turn on the radio there, which needs Dex 11
Full Spoil: Try to open a door first, so you get the "I dunno dexterity" response. Then turn over the two chairs, eat the chessboard, and flip the table which gets you to 3. At 3 you can open the the telephone drawer and dresser drawer to get 5. Then talk to Charles and shake hands for 6. Read the book and magazine to reach 8, write on the To DO list for 9, sign Jessica's form for 10, then PET the cat (not eat) for 11. Then turn on the radio.
Somebody Else's Problem: This one took me a bit too. One of the early quests should be delayed until you reach a certain level of understanding...
Hint 1: Some monsters in the Park may be more than they seem
Full spoil: Hold off on doing the cricket quest until you get Mysticality 9, then you can talk to them. They'll give you an item to use on the portal in the final encounter. Use that item. That's it.
Your Neck Will Go On: This you get for obtaining a certain item
Hint 1: It requires Chemistry and is found in the Big Moist.
Full Spoil: You need to make Barnacle Dissolver in the Chemistry lab, so need to be a Chem major. Take it and a diving helmet to the mob submarine int he big moist. Use the dissolver on the barnacle-crusted box in the flooded section, and you'll get a necklace with +7 all resistances.