  We calculate the instanton contribution to the proton strangeness in the MIT
bag enriched by the presence of a dilute instanton liquid. The evaluation is
based on expressing the nucleon matrix elements of bilinear strange quark
operators in terms of a model valence nucleon state and interactions producing
quark-antiquark fluctuations on top of that valence state. Our method combines
the usage of the evolution operator containing a strangeness source, and the
Feynman-Hellmann theorem. It enables one to evaluate the strangeness in
different Lorentz channels in, essentially, the same way. Only the scalar
channel is found to be affected by the interaction induced by the random
instanton liquid.
