How do I remove artifacts from my ContourPlot3D Valentine?

RegionPlot3D can sometimes give cleaner results out of the box. I also upped the PlotPoints manually.

Manipulate[
 RegionPlot3D[(x^2 + ((1 + b)*y)^2 + z^2 - 1)^3 - x^2*z^3 - 
    a*y^2*z^3 <= 0, {x, -scale, scale}, {y, -scale, 
   scale}, {z, -scale, scale}, Mesh -> None, Axes -> None, 
  Boxed -> False, 
  PlotStyle -> Directive[Red, Opacity[0.8], Specularity[White, 30]], 
  PlotPoints -> ControlActive[Automatic, 40]], {{a, .1}, .0001, 
  1}, {{b, 1}, .00001, 5}, {{scale, 1.25}, 1, 5}, 
 SynchronousUpdating -> False]

Adding the ContourPlot3D option PlotPoints -> n where n is some number greater than or equal to 100 improved things considerably for me. There is still a very faint ring around the lower portion of the heart when I do this, but it's a considerable improvement.

The PlotPoints argument tells Mathematica how many points to use when initially sampling the plot. Many functions (including 2D functions like DensityPlot) accept this argument. For whatever reason, the default is often quite low for functions/plots with rapid changes or singularities.

Demo:

First, without any additional argument:

Then with PlotPoints -> 200.