Puzzle

 ACROSS

  1 Holey rubber shoe

  5 She goes "baa"

  8 Without a warranty

 12 Health care helper

 13 In the ___ (not virtual)

 15 Either parent's nickname, perhaps

 16 *Smart home security features (see letters 7 to 9)

 19 Used Twitch, e.g.

 20 Swiss city known for early Dada art

 21 Subj. of Obama's 2016 JAMA article

 22 Prefix with "soft" or "sweet"

 23 *PC key combo of last resort (6 to 8)

 28 Soda with a vanilla variety

 32 Roth ___

 33 Tree secretion

 34 Stretchy glove material

 35 Group of artisans or Neopets players

 37 Section leaders, often: Abbr.

 38 Bit of silliness

 39 Pop Secret competitor

 40 Outdo

 42 Before, to Dickinson

 43 Paper purchase

 44 *Groovy ocean dweller (4 to 6)

 46 IVF cell

 48 Singer or "Mean Girls" character Janis

 49 Off course

 52 "Later!"

 57 Financial news site that hints at the starred answers' indicated letters?

 59 Decked out

 60 Fragile ecosystems

 61 Luxurious hair

 62 Certain

 63 Like just-painted nails

 64 CPR experts

DOWN

  1 Dishonest types, old-style

  2 Certain demonstration

  3 Stench

  4 Hotel breakfast basic

  5 "Ex's & Oh's" singer King

  6 Fuse, as metal

  7 Key to try before 23-Across

  8 Word after "Arab" or "Latin"

  9 Indian garment that may be nine yards

 10 Apple desktop

 11 Kate Middleton's wear

 13 Alpha ___

 14 Greenish eye color

 17 Rum brand

 18 Silent

 22 Karate instructor

 23 Hades smokes one in "Hercules"

 24 Break from fighting

 25 Sauce with yogurt and cucumber

 26 Lightning bolt on a weather map, briefly

 27 "Endless Love" singer Ross

 29 Monterey Bay Aquarium mammal

 30 Oscar nominee Knightley

 31 Perform very well

 34 Some snuggling pets

 36 Newlyweds may share one

 41 Marriages

 44 Party on "House Hunters"

 45 Right before the bell, say

 47 Yellow vehicle in "Little Miss Sunshine"

 49 Early lesson

 50 Cho's "Star Trek" role

 51 Bygone Russian title

 52 "Makes sense"

 53 Present

 54 Comic artist Ellis or skater Rippon

 55 Classy chap

 56 Mine deposits

 58 Stitch up

Solution